What is the entropy change in 2 mol $\mathrm{N_2}$, when its temperature is taken from 400 K to 800 K at constant pressure?
- A$30\,\mathrm{J\,K^{-1}}$
- B$60\,\mathrm{J\,K^{-1}}$
- C$40\,\mathrm{J\,K^{-1}}$
- D$20\,\mathrm{J\,K^{-1}}$
✓ Correct answer: C
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