Question

If the thermal capacity of a body is infinity, then which of the following statements are correct?

• A. Heat can never be added to it
• B. Heat can never be extracted from it
• C. The temperature of the body cannot be altered by adding or extracting any amount of heat
• D. It has infinite amount of heat

Answer 1

Answer: (C)

The temperature of the body cannot be altered by adding or extracting any amount of heat

The correct answer is option(C).

Theoretically infinite thermal conductivity corresponds to infinite heat transfer rate, i.e no matter how thick the body is , the temperature at the center of the body would reach to surrounding temperature with in no time.

If u take out the body with infinite thermal conductivity from a freezer in to the atmosphere, the temperature of each and every point in the body would fall to atmospheric temperature in no time.

No change in temperature takes place whether heat is taken in or given out