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WorksheetsExothermic and Endothermic
Total questions: 20
Worksheet time: 17mins
What piece of apparatus is used to measure temperature changes?
Top pan balance
Thermometer
Colorimeter
What term is given to a reaction which transfers heat energy to the surroundings?
Endothermic
Reversible
Exothermic
When barium hydroxide and ammonium chloride react, the temperature of the mixture decreases. What kind of reaction is this?
Endothermic
Decomposition
Exothermic
Which of the following should be used to contain the solution when investigating an energy change?
A polystyrene cup
A glass beaker
A measuring cylinder
If the energy change on an energy level diagram is negative, what does this tell you about the reaction?
It is endothermic
Nothing
It is exothermic
On a reaction profile, what does the height of the hump represent?
The activation energy
The energy change
The energy released when new bonds are made
Which of these is an endothermic reaction?
Combustion
Thermal decomposition
Oxidation of magnesium
What can you deduce from the reaction profile below?
The reaction is endothermic
A catalyst is present
More energy is released than absorbed
When calcium reacts with water, the temperature changes from 18°C to 39°C. Which statement is correct?
The solution at the end is acidic
The reaction is exothermic
The reaction is reversible
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
It is endothermic
It is exothermic
It is very slow
In an exothermic reaction...
energy is absorbed from the surroundings and the temperature increases
energy is released to the surroundings and the temperature of the surroundings increases
energy is absorbed from the surroundings and the temperature of the surroundings decreases
energy is released to the surroundings and the temperature of the surroundings decreases
In an endothermic reaction...
energy is absorbed from the surroundings and the temperature increases
energy is released to the surroundings and the temperature of the surroundings increases
energy is absorbed from the surroundings and the temperature of the surroundings decreases
energy is released to the surroundings and the temperature of the surroundings decreases
When an exothermic reaction takes place, the reaction mixture gives out heat because...
more energy is released when new bonds are formed than is taken in when existing bonds in the reactants are broken
the radiation energy produced by the reaction has to be got rid of via diffusion
energy is always absorbed in a chemical change which makes new substances
in an exothermic change, the products are less stable than the reactants
When ammonium nitrate is added to water, an endothermic reaction occurs and...
nothing changes
the temperature of the reaction mixture falls
the temperature rises
heat is given out
Which of the following reactions is exothermic?
Photosynthesis
Combustion
Ethanoic acid + sodium carbonate
Ammonium nitrate + water
Where will the products be in relation to the reactants in an endothermic energy diagram?
Lower
Higher
The same level
An energy level diagram doesn't show levels
Choose and write the correct answers.
The bonds between the atoms of the reactants / products need to be broken first, this is an endothermic / exothermic process. Theme bonds are made between the atoms of the reactants / products, this is an endothermic / exothermic process
If a reaction has a negative entropy and a negative enthalpy value, which of the following terms describes the energy of this reaction?
Endergonic
Exothermic
Endothermic
None of these
Is respiration an Endothermic or an Exothermic reaction?
Endothermic
Exothermic
Is this diagram endothermic or exothermic
Endothermic
Exotermic
Exothermic
Endote
