What is the difference between C_p and C_v?
C_p (constant pressure) exceeds C_v (constant volume) because at constant pressure some heat also does expansion work.
C_p (constant pressure) exceeds C_v (constant volume) because at constant pressure some heat also does expansion work. A reliable way to keep them apart is to focus on what each one is defined by, not just the similar-sounding words.
Key point
C_p vs C_v
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