Question

Suppose you have three bodies A, B and C. A and B are at same temperature. When B and C are brought in contact, heat flows from C to B until they are at same temperature. What will happen when A and C are brought in contact?

• A. Heat will flow from A to C.
• B. Heat will flow from C to A.
• C. Heat will not flow.
• D. Insufficient information

Answer 1

The correct option is B

Heat will flow from C to A.

Suppose initially A and B are at a temperature T. When B and C are brought in contact, heat flows from C to B until they are at same temperature S. As heat flows from C to B, the equilibrium temperature S will be greater than T. So, when A and C are brought in contact, heat will flow from C to A.