InterviewSolution
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InterviewSolution
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The second law of thermodynamics is a fundamental law of science. In this problem, we consider the thermodynamics of an ideal gas, phase transition, and chemical equilibrium. Three moles of `CO_(2)` gas expands isothermally (in thermal contact with the surroundings, temperature `= 15.0^(@)C`) against a fixed external pressure of `1.00 bar`. The initial and final volumes of the gas are `10.0 L` and `30.0L`, respectively. Assuming `CO_(2)` to be an ideal gas, `Delta_(sys)S` isA. `27.4 J K^(-1)`B. `9.1J K^(-1)`C. `-27.4J K^(-1)`D. `-9.1 J K^(-1)` |
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Answer» `-`Work done `=q = nRT In (V_(2))/(V_(1))` `= 3 xx 8.314 xx 288.15 xx In ((30)/(10))` `:. DeltaS = (q)/(T)` or `Delta_(sys)S = (3 xx 8.314 xx 288.15 xx In(30)/(10))/(288.15) = 27.4 J K^(-1)` |
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