Free Printable Endothermic and Exothermic

1.

In an exothermic reaction...

a)

energy is absorbed from the surroundings and the temperature increases

b)

energy is released to the surroundings and the temperature of the surroundings increases

c)

energy is absorbed from the surroundings and the temperature of the surroundings decreases

d)

energy is released to the surroundings and the temperature of the surroundings decreases

2.

If a reaction releases more energy when new bonds are made than the amount of energy absorbed to break bonds in the reactants, which statement is true? - Higher

a)

It is endothermic

b)

It is exothermic

c)

It is very slow

3.

When calcium reacts with water, the temperature changes from 18°C to 39°C. Which statement is correct?

a)

The solution at the end is acidic

b)

The reaction is exothermic

c)

The reaction is reversible

4.

What can you deduce from the reaction profile below?

a)

The reaction is endothermic

b)

A catalyst is present

c)

More energy is released than absorbed

5.

Which of these is an endothermic reaction?

a)

Combustion

b)

Thermal decomposition

c)

Oxidation of magnesium

6.

Examples of endothermic reactions

a)

Photosynthesis

b)

Ice melting

c)

Respiration

d)

Sodium carbonate + ethanoic acid

e)

Water + calcium oxide

7.

if less heat energy is released in making bonds in the products than is taken in when breaking bonds in the reactants

a)

Endothermic

b)

Exotermic

c)

Exothermic

d)

Entrothermic

8.

if more heat energy is released in making bonds in the products than is taken in when breaking bonds in the reactants

a)

Exothermic

b)

Endothermic

c)

Exotermic

d)

Endotermic

9.

What term is given to a reaction which transfers heat energy to the surroundings?

a)

Endothermic

b)

Reversible

c)

Exothermic

d)

Exotermic

10.

What type of chemical reaction absorbs energy and requires energy for the reaction to occur?

a)

Endothermic

b)

Exotermic

c)

Exothermic

d)

Endotermic

11.

Have you ever eaten sherbet sweets candy? They fizz in your mouth and your tongue feels cold. Why do you think that is?

a)

It is an exothermic reaction

b)

It is an endothermic reaction

c)

It is made of ice

d)

It is dissolving your mouth

12.

What type of reaction is shown in the photo?

a)

Exothermic

b)

Isothermic

c)

Endothermic

d)

None of the above

13.

Baking bread and cooking an egg are examples of....?

a)

Endothermic processes

b)

Exothermic processess

c)

None of these

14.

Is photosenthysis an Exothermic or an Endothermic reaction?

a)

Endothermic

b)

Exothermic

15.

Is respiration an Endothermic or an Exothermic reaction?

a)

Endothermic

b)

Exothermic

16.

During an endothermic reaction in a beaker if we are part of the surroundings and touched the beaker, it would feel _______.

a)

Warm

b)

Cold

17.

In an endothermic reaction, heat is ...

a)

taken in

b)

given out

18.

In an exothermic reaction, heat is ...

a)

taken in

b)

given out

19.

When barium hydroxide and ammonium chloride react, the temperature of the mixture decreases. What kind of reaction is this?

a)

Endothermic

b)

Decomposition

c)

Exothermic

d)

Indothermic

20.

a)

Endothermic

b)

Exothermic

21.

a)

Endothermic

b)

Exothermic

22.

Heat pack

a)

Endothermic

b)

Exothermic

23.

Feels cold

a)

Endothermic

b)

Exothermic

24.

Evaporation of sweat

a)

Endothermic

b)

Exothermic

25.

Feels warm or hot

a)

Endothermic

b)

Exothermic

26.

Burning and combustion

a)

Endothermic

b)

Exothermic

27.

Photosynthesis absorbs the energy of the sun to produce glucose and oxygen. This reaction is

a)

Exothermic

b)

Endothermic

28.

If you feel the temperature increase in a chemical reaction, then it is

a)

Endothermic

b)

Exothermic

29.

If you feel the temperature decrease in a reaction then it is

a)

Exothermic

b)

Endothermic

30.

Which of the following are examples of an exothermic chemical reaction? Check all that apply.

a)

Photosynthesis

b)

Burning a piece of wood

c)

Freezing water into ice

d)

None of the above

31.

Water condensing from a gas to a liquid releases energy. This is an example of...

a)

An exothermic reaction

b)

An endothermic reaction

32.

Sitting by a warm campfire on a cold night, the campfire is an example of

a)

An exothermic reaction

b)

An endothermic reaction

33.

An exothermic reaction

a)

Releases heat

b)

Absorbs heat

c)

Discovers

d)

Relieves

34.

An endothermic reaction

a)

Releases heat

b)

Absorbs heat

c)

Discovers

d)

Relieves

35.

If they energy required to break the bonds is less than the energy given out by making new bonds the reaction is

a)

Exothermic

b)

Endothermic

c)

Neutralisation

36.

____ reactions usually feel cold.

a)

endothermic

b)

exothermic

37.

$O_2\left(g\right)\ +\ 2\ H_2\ \left(g\right)\ \rightarrow\ 2\ H_2O\ \left(g\right)\ +\ Energy$

a)

endothermic

b)

exothermic

38.

$6\ CO_2+\ 6\ H_2O\ +\ Energy\ \rightarrow\ C_6H_{12}O_6\ +\ 6\ O_2$

a)

endothermic reaction

b)

exothermic reaction

39.

_____ reactions usually feel hot!

a)

endothermic

b)

exothermic

40.

Ice melting is an example of (a) reaction.

41.

When we eat refreshing sweets the chemicals mix with the (a) in our mouth.

42.

In serbet sweets there is a mixture of dry (a) and sodium hydrogen carbonate.

43.

Panam carries out an exothermic reaction, which preliminary work can she do before the experiment to tell that heat is generated?

a)

using a thermometer

b)

using a stop watch

c)

using a water bath

d)

none

44.

In (a) reactions heat energy is absorbed.

45.

While eating refreshing sweets we feel cool because ____________ is absorbed from our mouth.

a)

saliva

b)

heat

c)

cold

d)

none

46.

Ali is mixing chemical A with chemical B and notices a fall in temperature, while writing the conclusion he decides that it is a (a) reaction.

47.

The ice pack absorbs _________________ from the skin.

a)

cold

b)

heat

c)

both

d)

none

48.

In ice packs, water and ________________ are present in two compartments.

a)

lead nitrate

b)

copper nitrae

c)

silver nitrate

d)

ammonium nitrate

49.

Ice melts due to:

a)

vibration of particles

b)

gain in kinetic energy

c)

both

d)

none

50.

What is an example of an endothermic change.

a)

Photosynthesis

b)

Combustion

51.

What does the image represent?

a)

An endothermic change

b)

An exothermic change

52.

What does the image represent?

a)

An endothermic change

b)

An exothermic change

53.

Endothermic ______________________________.

a)

gives off energy to the environment

b)

takes energy from the environmen

54.

What is an example of an exothermic change.

a)

Photosynthesis

b)

Combustion

55.

The figure shows an _____ reaction

a)

endothermic

b)

exothermic

56.

In the figure, heat energy is _____ during the reaction.

a)

released

b)

absorbed

57.

In the figure, the reactants have _____ energy than the products.

a)

more

b)

less

58.

The figure shows an _____ reaction.

a)

endothermic

b)

exothermic

59.

In the figure, heat energy is _____ during the reaction.

a)

released

b)

absorbed

60.

In the figure, the reactants have _____ energy than the products.

a)

more

b)

less

61.

In a laboratory, a student combines vinegar and baking soda into a beaker. The initial temperature is 28 degrees Celsius and the final temperature reading two minutes later is 20 degrees Celsius. Is this an endothermic or an exothermic reaction?

a)

endothermic reaction

b)

exothermic reaction

62.

If they energy required to break the bonds is less than the energy given out by making new bonds the reaction is

a)

Exothermic

b)

Endothermic

c)

Neutralisation

63.

_____ reactions usually feel hot!

a)

endothermic

b)

exothermic

64.

$6\ CO_2+\ 6\ H_2O\ +\ Energy\ \rightarrow\ C_6H_{12}O_6\ +\ 6\ O_2$

a)

endothermic reaction

b)

exothermic reaction

65.

$O_2\left(g\right)\ +\ 2\ H_2\ \left(g\right)\ \rightarrow\ 2\ H_2O\ \left(g\right)\ +\ Energy$

a)

endothermic

b)

exothermic

66.

If they energy required to break the bonds is greater than the energy given out by making new bonds the reaction is

a)

Exothermic

b)

Endothermic

c)

Neutralisation

67.

Have you ever eaten sherbet sweets candy? They fizz in your mouth and your tongue feels cold. Why do you think that is?

a)

It is an exothermic reaction

b)

It is an endothermic reaction

c)

It is made of ice

d)

It is dissolving your mouth

68.

In an endothermic reaction, heat is ...

a)

taken in or absorbed

b)

given out or released

69.

Exothermic reactions...

a)

Absorb energy

b)

Release energy

c)

Release Color

d)

Absorb Color

70.

What type of reaction occurs in a hand warmer

a)

exothermic

b)

endothermic

71.

How can you tell this reaction is exothermic: MgO + CaS ----> CaO + MgS + 200 KJ

a)

Energy is written on the products side

b)

Energy is being released

c)

Less energy is stored on product side

d)

All of these tell me

72.

In this equation, is more energy stored in the bonds of the reactants or products: NaCl + AgF +100KJ -----> NaF + AgCl

a)

Products

b)

Reactants

73.

What type of reaction is this?

a)

Exothermic

b)

Endothermic

c)

Energy Producing

d)

No way to tell

74.

What kind of equation is this: 2KI + MgCl₂ + 200KJ ----> 2KCl + MgI₂

a)

Endothermic

b)

Exothermic

75.

Are the products or reactants of this reaction storing more energy in their chemical bonds?

a)

Both storing the same

b)

No way to tell

c)

Products

d)

Reactants

76.

How much activation energy is needed for this reaction?

a)

300 KJ

b)

500 KJ

c)

400 KJ

d)

100 KJ

77.

What is the Heat of Reaction $\Delta H$ for this reaction?

a)

-200 KJ

b)

200 KJ

c)

400 KJ

d)

-300 KJ

78.

Which statement is true regarding endothermic reactions?

a)

a) Temperature change is positive and enthalpy change is positive

b)

b) Temperature change is positive and enthalpy change is negative

c)

c) Temperature change is negative and enthalpy change is positive

d)

d) Temperature change is negative and enthalpy change is negative

79.

Define 'Enthalpy'

a)

a) Energy stored in the movement of molecules in a substance

b)

b) The opposite of temperature

c)

c) The temperature of a molecule

d)

d) Energy stored in the chemical bonds in a substance

80.

A catalyst works by

a)

changing the order of the reaction

b)

increasing the temperature

c)

lowering the activation energy

d)

making the activated complex

81.

ΔH value in an endothermic reaction is a positive number.

a)

True

b)

False

82.

What does "exo" mean?

a)

in/inside/absorb

b)

heat

c)

none of these

d)

out/outside/

release

83.

Feels warm...

a)

Exothermic

b)

c)

Endothermic

d)

84.

Feels cool...

a)

Exothermic

b)

c)

Endothermic

d)

85.

What does "thermic" mean?

a)

in/inside/absorb

b)

heat

c)

none of these

d)

out/outside/

release

86.

What does "endo" mean?

a)

in/inside/absorb

b)

heat

c)

none of these

d)

out/outside/

release

87.

Which reaction absorbs energy?

a)

Exothermic

b)

c)

Endothermic

d)

88.

Which reaction releases energy?

a)

Exothermic

b)

c)

Endothermic

d)

89.

When the temperature decreases, it is an _______ reaction.

a)

Exothermic

b)

c)

Endothermic

d)

90.

When the temperature increases, it is an _______ reaction.

a)

Exothermic

b)

c)

Endothermic

d)

91.

Combustion (fireworks, explosions, burning, etc.) is an example of which reaction?

a)

Endothermic

b)

Exothermic

c)

Neither

d)

92.

Photosynthesis is an example of which reaction?

a)

Endothermic

b)

Exothermic

c)

Neither

d)

93.

Cooking an egg is an example of which reaction?

a)

Endothermic

b)

Exothermic

c)

Neither

d)

94.

Burning sugar is an example of which reaction?

a)

Endothermic

b)

Exothermic

c)

Neither

d)

95.

Baking bread is an example of which reaction?

a)

Endothermic

b)

Exothermic

c)

Neither

d)

96.

The rusting of iron is an example of which reaction?

a)

Endothermic

b)

Exothermic

c)

Neither

d)

97.

Have you ever eaten sherbet sweets candy? They fizz in your mouth and your tongue feels cold. Why do you think that is?

a)

It is an exothermic reaction

b)

It is an endothermic reaction

c)

It is made of ice

d)

It is dissolving your mouth

98.

A melting ice cube is an example of

a)

exothermic

b)

endothermic

c)

none

d)

both

99.

Fireworks are an example of

a)

exothermic

b)

endothermic

c)

both

d)

none

100.

Your hands get cold outside from not wearing gloves

a)

exothermic

b)

endothermic

c)

both

d)

none

101.

When heat is released it is an

a)

exothermic reaction

b)

endothermic reaction

c)

both

d)

none

102.

This is when heat is absorbed, it is an

a)

Exothermic reaction

b)

endothermic reaction

c)

both

d)

none

103.

A student mixed two chemicals to allow them to react. The temperature before the reaction was 25 ° C. The temperature after the reaction was 18° C. Which of the following is true?

a)

It is an exothermic reaction

b)

It is an endothermic reaction

104.

$6\ CO_2+\ 6\ H_2O\ +\ Energy\ \rightarrow\ C_6H_{12}O_6\ +\ 6\ O_2$

a)

endothermic reaction

b)

exothermic reaction

105.

$O_2\left(g\right)\ +\ 2\ H_2\ \left(g\right)\ \rightarrow\ 2\ H_2O\ \left(g\right)\ +\ Energy$

a)

endothermic

b)

exothermic

106.

5. When ammonium chloride dissolves in water the temperature falls. The type of energy change is described as?

a)

A. exothermic

b)

B. activated

c)

C. decomposition

d)

D. endothermic

107.

What type of reaction occurs in a hand warmer?

a)

exothermic

b)

endothermic

108.

Is photosenthysis an Exothermic or an Endothermic reaction?

a)

Endothermic

b)

Exothermic

109.

What type of reaction is shown in the photo?

a)

Exothermic

b)

Isothermic

c)

Endothermic

d)

None of the above

110.

Baking bread and cooking an egg are examples of....?

a)

Endothermic processes

b)

Exothermic processess

c)

None of these

111.

During an endothermic reaction in a beaker if we are part of the surroundings and touched the beaker, it would feel _______.

a)

Warm

b)

Cold

112.

If a chemical reaction is EXOTHERMIC, the temperature would....

a)

Stay the same

b)

Increase

c)

Decrease

113.

1. Equal amounts of four different substances (A-D) where added separately to equal amounts of an acid and a thermometer placed in the mixture. For which substance is the reaction the most exothermic?

a)

A. temperature rises by 3 $\degree C$

b)

B. temperature falls by 5 $\degree C$

c)

C. temperature falls by 3 $\degree C$

d)

D. temperature rises by 5 $\degree C$

114.

6. Which of these processes is always exothermic?

a)

A. evaporation

b)

B. burning

c)

C. insulation

d)

D. melting

115.

In an exothermic reaction, heat is ...

a)

taken in

b)

given out

116.

In an endothermic reaction, heat is ...

a)

taken in

b)

given out

117.

The initial temperature was measured to be 20^oC and the final temperature was 10^oC. The reaction was

a)

exothermic

b)

endothermic

118.

The initial temperature was measured to be 20^oC and the final temperature was 45^oC. The reaction was

a)

exothermic

b)

endothermic

119.

Which of the following is a sign that a chemical reaction has occurred?

a)

change in shape

b)

melting

c)

there was colour change

d)

dissolving

120.

Dissolving ammonium nitrate

a)

endothermic

b)

exothermic

121.

Neutralisation reactions

a)

endothermic

b)

exothermic

122.

Displacement reactions

a)

endothermic

b)

exothermic

123.

Photosynthesis

a)

endothermic

b)

exothermic

124.

Surrounding temperature gets cold

a)

Endothermic

b)

Exothermic

125.

Surrounding temperature gets warmer

a)

endothermic

b)

exothermic

126.

HCl reacts with Zn giving off heat

a)

endothermic

b)

exothermic

127.

If a chemical reaction is EXOTHERMIC, the temperature would....

a)

Stay the same

b)

Increase

c)

Decrease

128.

After you mix two substances together, a new substance forms. This is an example of:

a)

Physical Change

b)

Chemical Change

129.

Which of the following is a sign that a chemical reaction has occurred?

a)

change in shape

b)

melting

c)

bubbles of gas appear

d)

dissolving

130.

When a candle is lit hydrocarbons are combusting. An exothermic reaction is occuring. Energy is being _________________ .

a)

absorbed

b)

frozen

c)

destroyed

d)

released

131.

'Have you ever eaten sherbet sweets? They fizz in your mouth and your tongue feels cold. Why do you think that is?'

a)

It is an exothermic reaction

b)

It is an endothermic reaction

c)

It is made of ice

d)

It is dissolving your mouth

132.

What instrument would you use to detect an endothermic or exothermic reaction?

a)

triple beam balance

b)

ruler

c)

thermometer

133.

Exo means out or ________.

a)

absorbed

b)

released

134.

Endo means in or _______.

a)

absorbed

b)

released

135.

____ reactions usually feel cold.

a)

endothermic

b)

exothermic

136.

In an endothermic reaction, energy is _________.

a)

absorbed

b)

released

137.

When an _____ reaction occurs, the reactants are at a lower energy.

a)

endothermic

b)

exothermic

138.

Endothermic ______________________________.

a)

gives off energy to the environment

b)

takes energy from the environmen

139.

Exothermic _____________________________.

a)

gives of energy to the environment

b)

takes energy from the environment

140.

Physical and chemical changes happen by a transfer of energy in form of __________, __________ or __________.

a)

molecules

b)

heat

c)

electricity

d)

light

e)

sound

Endothermic and Exothermic

Total questions: 140

Worksheet time: 1hrs 16mins

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