QuestionThermodynamics / internal energy
A 0·04 mole sample of a monatomic gas at 1·00 atm pressure and 298 K expands isothermally and reversibly from an initial volume of 1·0 L to 10·0 L. It is then heated to 500 K, followed by isothermal compression to 1·00 L and finally cooled to 25 °C. The ΔU for the overall process is
- (a) 228 J
- (b) −228 J
- (c) zero
- (d) 456 J
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