Practice Test

Question 1

Substance X transfers thermal energy to substance Y through conduction. What is an accurate conclusion about the condition of both substances before conduction occurred?

Revolt · Accepted Answer

Substance X’s molecules were faster than substance Y’s.

Question 2

Which is the best example of decreasing entropy?

Revolt · Accepted Answer

A pile of dirt on a floor is cleaned up with a broom.

Question 3

Which describes the movement of a fluid during convection?

Revolt · Accepted Answer

Warm fluid rises and cool fluid sinks.

Question 4

Sixty-three joules of heat are added to a closed system. The initial internal energy of the system is 58 J, and the final internal energy is 93 J. How much work is being done by the system?

Revolt · Accepted Answer

28 J

Question 5

In the heat equation, what does Q represent?

Revolt · Accepted Answer

heat required to raise the temperature

Question 6

According to the first law of thermodynamics, what could happen when heat is added to a system?

Revolt · Accepted Answer

The heat is turned into work done by the system.

Question 7

Which best describes the relationship between internal energy and thermal energy?

Revolt · Accepted Answer

Thermal energy is the portion of internal energy that can be transferred.

Practice Test Answers

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