If the volume of a gas is reduced to half of its original volume, then the specific heat of the gas will
Correct answer: C. Remain constant.
- A. Be halved.
- B. Be doubled.
- C. Remain constant.
- D. Vary unpredictably.
Explanation
The specific heat of a gas, defined as the amount of heat required to change the temperature of a unit mass of the gas by one degree, is a property that stays constant under a given set of conditions. For ideal gases, specific heat capacities are not directly influenced by changes in volume but rather depend on the type of process the gas undergoes (e.g., constant volume or constant pressure). Option C is correct because the specific heat of the gas remains constant despite the volume change. Options A and B are incorrect because they suggest a direct proportional change in specific heat with volume, which is not accurate. Option D is incorrect because the specific heat does not vary unpredictably; it is a well-defined property.
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About Molar Specific Heat of a Gas
Molar specific heat is the heat required to raise the temperature of one mole of a gas by one kelvin, expressed through Q = nCΔT. Questions compare the constant volume value Cv with the constant pressure value Cp, apply the ideal gas relation Cp − Cv = R, and identify how the thermodynamic process affects heat capacity.
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