Question

For a certain engineering application, it is required to rise the temperature of a given mass of a body as quickly as possible. The material should have

• A. High specific heat capacity
• B. High density
• C. Low specific heat capacity
• D. Heat capacity

Answer 1

The correct option is C

Low specific heat capacity

Explanation for correct answer.

Option (C). Low specific heat capacity.

Specific heat capacity:

1. The heat energy required to raise the temperature of unit mass of substance through 1 degree is called specific heat capacity.
2. The heat energy ($Q$) absorbed by a given body increases in direct proportion to its mass ($m$) and rise in temperature ($∆\theta$).
3. Thus, the heat energy absorbed by a given body is given as $Q=m\times s\times ∆\theta$, where $s$ is the specific heat capacity.
4. Specific heat capacity $s=\frac{Q}{m∆\theta }$.
5. Thus, specific heat of a substance is inversely proportional to change of temperature.
6. Hence, for a certain engineering application, it is required to rise the temperature of a given mass of a body as quickly as possible. The material should have low specific heat capacity.

Thus, for a certain engineering application, it is required to rise the temperature of a given mass of a body as quickly as possible. The material should have low specific heat capacity. Hence, the option C is the right answer.