Enthalpy changes over a constant pressure path are always zero for ______________ gas?
Correct answer: B. A perfect
- A. Any
- B. A perfect
- C. An easily liquefiable
- D. A real
Explanation
For a perfect gas, enthalpy depends only on temperature, and at constant pressure the temperature remains constant for a fixed amount and composition of gas. Therefore its enthalpy change is zero, unlike a general real gas.
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