⚙️ FE Exam Prep

Specific heat at constant pressure (cₚ) is always greater than specific heat at constant volume (cᵥ) because:

A Temperature is higher at constant pressure
B At constant pressure, some energy goes into expansion work (PdV)
C Gases are incompressible
D Volume doesnt change

✓ Correct Answer: Option B

At constant P, the system does PdV work on expansion, requiring extra heat. cₚ − cᵥ = R for ideal gases.

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