Heat - Quiz Quiz

Question 1

The temperature of a gas is increased. Which statement best explains the effect that this has on the motion of gas particles?

Revolt · Accepted Answer

C: The average kinetic energy increases, and the particles collide more frequently.

Question 2

What is thermal energy?

Revolt · Accepted Answer

B: the kinetic energy of particles in a system

Question 3

A student touches a freshly baked cake that was taken out of the oven. Which best explains why the cake feels hot?

Revolt · Accepted Answer

B: Molecules in the cake are moving faster than molecules in the skin.

Question 4

In what type of reaction or process does heat flow into the system?

Revolt · Accepted Answer

D: endothermic

Question 5

Which answer defines exothermic reaction ?

Revolt · Accepted Answer

B: a process in which energy is released as heat

Question 6

Which event is endothermic?

Revolt · Accepted Answer

D: the melting of ice

Question 7

A hot metal plate at 150 times degree C has been placed in air at room temperature. Which event would most likely take place over the next few minutes?

Revolt · Accepted Answer

B: The air molecules that are surrounding the metal will speed up, and the molecules in the metal will slow down.

Question 8

Which reaction is exothermic?

Revolt · Accepted Answer

D: CH sub 4 plus 2 cap o sub 2 rightarrow CO sub 2 plus 2 cap h sub 2 cap o plus 891 kJ

Question 9

Which statement about exothermic reactions is accurate?

Revolt · Accepted Answer

B: As reactants form products, the potential energy decreases.

Question 10

Heat that flows by conduction is the transfer of thermal energy between substances in contact. What must occur for this to happen?

Revolt · Accepted Answer

B: One system must have higher kinetic energy than the other system.

Heat - Quiz Quiz Answers

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