Question

Consider the following statements.

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

B. Heat flows from an object with higher thermal energy to one with lower thermal energy;

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

Which statements are true?

1. All are true.

2. C only

3. A and B only

4. A only

5. B and C only

6. None is true.

7. B only

8. A and C only

Answer 1

2. C only

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

Statement A is false. Direction of heat flow has nothing to do with state of object (liquid or solid). It only depends upon temperatures.

Statement B is false. As a body having lower temperature can have higher energy because thermal energy is not just a function of temperature but a function of mass also.