Free Printable Energy Review

Worksheets

Energy Review

Total questions: 20

Worksheet time: 15mins

Name

Class

Date

How do molecules at warm temperatures differ from molecules at cool temperatures?

a. At warm temperatures, molecules move around more

b. At warm temperatures, molecules grow in siz

c. At warm temperatures, molecules exchange electrons more easil

d. At warm temperatures, molecules combine with each other more easil

In an exothermic reaction, heat is ...

taken in

given out

In an endothermic reaction, heat is ...

taken in

given out

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

Warm

Cold

Which of the following process is exothermic?

Candle was melting

A puddle evaporating

Dry ice (solid carbon dioxide) subliming to form gaseous carbon dioxide

Water freezing to form ice

Solid --> liquid --> gas is what type of reaction?

endothermic

exothermic

catalytic

inhibited

gas --> liquid --> solid is what type of reaction?

endothermic

exothermic

catalytic

inhibited

The graph above is from which type of reaction?

Endothermic reaction

Exothermic Reaction

The graph above is from which type of reaction?

Endothermic reaction

Exothermic reaction

10.

What line segment represents only the solid state?

A-B

B-C

C-D

D-E

11.

In which segment is the kinetic energy remaining constant?

A-B

B-C

C-D

E-F

12.

Which process takes the longest to occur?

melting

boiling

freezing

heating the solid

13.

What state(s) of matter are present at D-E?

Solid-liquid

Liquid

Liquid-gas

Gas-Solid

14.

Between which points is the temperature of the substance remaining constant?

A-B only.

A-B, C-D, E-F

B-C only.

B-C, D-E

15.

What is the melting point for this substance?

60 °C

40 °C

80 °C

100 °C

16.

What is the freezing point for this substance?

60 °C

40 °C

80 °C

100 °C

17.

Evaporation is what kind of change?

Endothermic

Exothermic

18.

This curve indicates what about the heat energy?

Heat energy is being added or absorbed

Heat energy is being released

19.

When a substance is melting or boiling, heat is being added. This heat is being used to...

increase the temperature of the substance

increase the speed of the particles in the substance

break the intermolecular forces between the particles in a substance

All of the above

20.

Intermolecular forces are the forces

within molecules

between molecules

Reset

Energy Review

Total questions: 20

Worksheet time: 15mins

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