Question

Consider the following statements.

A. Heat flows from an object with higher

thermal energy to one with lower thermal energy;

B. Heat flows from an object in liquid state to an object in solid state;

C. Heat flows from an object at higher temperature to an object at lower temperature.

Which statements are true?

1. All are true.

2. A and C only

3. B and C only

4. C only

5. None is true.

6. A and B only

7. A only

8. B only

Answer 1

Heat always flows from an object at higher temperature to an object at lower temperature. For example, a red-hot iron poker is at a very high temperature and the ocean is at a relatively cool temperature. However, the ocean has far more thermal energy than the iron poker by virtue of its size. Heat will flow from the iron to the ocean because of the difference in temperature.

Answer: 4. C only