With increase in pressure (above atmospheric pressure), the Cp of a gas_____________________?
Correct answer: C. Increases
- A. Remains unchanged
- B. Decreases
- C. Increases
- D. First decreases and then increases
Explanation
For real gases at pressures above atmospheric pressure, intermolecular effects generally make the isobaric heat capacity increase with pressure. The constant-Cp assumption applies approximately to an ideal gas, not generally to a real gas at elevated pressure.
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