Question

Specific heat of a substance can be :

• A. zero
• B. positive
• C. Infinity
• D. negative

Answer 1

Answer: (A), (B), (C), (D)

The correct options are
A zero
B negative
C positive
D Infinity

Specific heat is the amount of heat that is required to raise the temperature of 1 gram of a substance by 1 degree Celcius.

Specific heat $C=\frac{\partial Q}{△T△m}kJ/kgK$

For isothermal process, $△T=0$

Hence $C=\infty$

For isothermal process, $\partial Q=0$

Hence $C=0$

When heat is absorbed by the system, q is positive. So specific heat will be positive.

When heat is absorbed from the system, q is negative. So specific heat will be negative.