Question

The amount of heat energy required to raise the temperature of unit mass of a substance by 1 degree celsius is called _______.

• A. latent heat of vaporization
• B. specific heat capacity
• C. latent heat of fusion
• D. heat capacity

Answer 1

The correct option is B specific heat capacity

The amount of heat energy required to raise the temperature of unit mass of a substance by 1 degree celsius is called specific heat capacity.

Explanation:

If by supplying the heat of Q to a substance of mass m, its temperature increases by Δt, then

Q ∝ mΔt

or Q = cmΔt

where c= constant of proportionality, called specific heat capacity of the body.

Now, if m = 1, Δt = 1° C, then, Q = c.

therefore, specific heat is the heat required to raise the temperature of a unit mass of a substance by one degree Celsius.