WorksheetsEnergy
Total questions: 45
Worksheet time: 23mins
Describe the flow of energy of the system: A cold metal spoon is added to a mug of hot water.
There is no change in energy between the spoon and the water
The spoon loses energy and the water gains energy
The spoon gains energy and the water loses energy
The spoon and the water gain energy
How does water freeze?
Chemical energy flows from the water to the surroundings
Chemical energy flows from the surroundings to the water
Thermal energy flows from the water to the surroundings
Thermal energy flows from the surroundings to the water
Which of the following is an endothermic process?
water in a pond evaporating over time
burning a scented candle
activating a hand warmer
water condensing on a glass
Which of the following is an exothermic process?
mixing alkseltzer and water and the cup becoming cool
cheese melting for nachos
baking a birthday cake
fireworks on the Fourth of July
In a reaction where the reactants have a higher energy than the products, determine if it is endo/exothermic and whether the change in enthalpy is positive or negative.
exothermic, -
endothermic, -
exothermic, +
endothermic, +
In a reaction where the products have a higher energy than the reactants, determine if it is endo/exothermic and whether the change in enthalpy is positive or negative.
exothermic, +
endothermic, +
exothermic, -
endothermic, -
What state of matter has the highest energy?
solid
liquid
gas
plutonium
What state of matter has the lowest energy?
solid
liquid
gas
plutonium
What does A represent on the heating curve?
liquid
solid
melting
freezing
What does B represent on the heating curve?
liquid
solid
melting
freezing
What does C represent on the heating curve?
gas
solid
melting
liquid
What does D represent on the heating curve?
gas
evaporation
melting
condensation
What does E represent on the heating curve?
gas
evaporation
liquid
condensation
Endo/Exothermic: Melting
Endothermic
Exothermic
Endo/Exothermic: Evaporation
Endothermic
Exothermic
Endo/Exothermic: Condensation
Endothermic
Exothermic
Endo/Exothermic: Freezing
Endothermic
Exothermic
Describe the flow of energy of the system: A person jumping into a cold pool.
There is no change in energy between the person and the water
The person loses energy and the water gains energy
The person gains energy and the water loses energy
The person and the water gain energy
Describe the flow of energy of the system: Running a fresh burn under cool water.
There is no change in energy between the burn and the water
The burn loses energy and the water gains energy
The burn gains energy and the water loses energy
The burn and the water gain energy
Describe the flow of energy of the system: A s'more cooking over an open fire.
There is no change in energy between the s'more and the fire
The fire loses energy and the s'more gains energy
The fire gains energy and the s'more loses energy
The s'more and the fire lose energy
In an exothermic reaction, the temperature of the surroundings...
increases
decreases
In an endothermic reaction, the temperature of the surroundings...
increases
decreases
What is the change in enthalpy if the reactants have 70 kJ of energy and the products have -10 kJ of energy?
80 kJ
60 kJ
-80 kJ
-60 kJ
What is the change in enthalpy if the reactants have 20 kJ of energy and the products have 45 kJ of energy?
25 kJ
65 kJ
-25 kJ
-65 kJ
What is the change in enthalpy if the reactants have 10 kJ of energy and the products have -10 kJ of energy?
20 kJ
-20 kJ
0 kJ
100 kJ
What is the change in enthalpy if the reactants have 50 kJ of energy and the products have 120 kJ of energy?
70 kJ
170 kJ
0 kJ
-70 kJ
In an endothermic reaction, change in enthalpy (ΔH) is...
positive
negative
In an exothermic reaction, change in enthalpy (ΔH) is...
positive
negative
If the surrounding temperature increases, the reaction is
endothermic
exothermic
If the surrounding temperature decreases, the reaction is
endothermic
exothermic
The transfer of heat by a cool ocean breeze on a warm day is an
example of
conduction
convection
radiation
fission
The transfer of heat by the fans of an air fryer is an
example of
conduction
convection
radiation
fission
The transfer of heat by cooking food in a microwave is an
example of
conduction
convection
radiation
fission
The transfer of heat by the sun to the earth is an
example of
conduction
convection
radiation
fission
The transfer of heat by the rising warmth of a candle is an
example of
conduction
convection
radiation
fission
The transfer of heat by butter melting on corn is an
example of
conduction
convection
radiation
fission
The transfer of heat by a cup of coffee to a spoon used to stir is an
example of
conduction
convection
radiation
fission
_____ is why we have weather patterns due to the uneven heating of our atmosphere.
conduction
convection
radiation
fission
_____ is why the Earth is warmed by the sun despite the vast vacuum of space between the two.
conduction
convection
radiation
fission
Used to measure amounts of heat transferred to or from a substance
specific heat
calorimetry
radiation
fission
The quantity of heat required to raise the temp. of one gram of a substance by one Celsius degree
convection
calorimetry
activation energy
specific heat
A battery is an example of ____ energy
chemical
mechanical
nuclear
activation
Water boiling is an example of ____ energy
chemical
mechanical
thermal
activation
The energy stored in chemical bonds within a compound
electrical
radiation
nuclear
chemical
The energy stored in nucleus of an atom
electrical
radiation
nuclear
chemical
