Two different samples have the same mass and temperature. Equal quantities of energy are absorbed as heat by each. Their final temperature may be different because the samples have different:
Correct answer: D. Heat capacities
- A. Thermal conductivities
- B. Coefficients of expansion
- C. Densities
- D. Heat capacities
Explanation
The correct answer is that the samples have different specific heat capacities. Specific heat capacity determines how much heat is needed to change the temperature of a substance. A material with a higher specific heat capacity will experience a smaller temperature increase compared to a material with a lower specific heat capacity when the same amount of heat is absorbed.Other options such as thermal conductivities, coefficients of expansion, and densities affect other physical properties but do not directly influence the temperature change when heat is absorbed.
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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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