The molar specific heat of a diatomic gas is measured at constant volume and found to be 29.1 J/mol.K. What are the types of energy that are contributing to the molar specific heat?
Correct answer: D. Translation, rotation, and vibrational
- A. Transition only
- B. Translational and rotation only
- C. Translation and vibrational only
- D. Translation, rotation, and vibrational
Explanation
The total molar specific heat for a diatomic gas includes contributions from both translational and rotational degrees of freedom, while vibrational contributions are typically negligible at room temperature. The specific contributions from each form of kinetic energy may vary depending on the temperature and the molecular properties of the gas.For diatomic gas it can be broken down into;CV = CROT + CTRANS + CVIB
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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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