InterviewSolution
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InterviewSolution
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What work is to be done on `2mol` of a perfect gas at `27^(@)C` it is compressed reversibly and isothermally from a pressure of `1.01 xx 10^(5) Nm^(-2) to 5.05 xx 10^(6)Nm^(-2)`?A. work done on the gas is `1.9518 xx 10^(4)J`B. Free energy change for the process is `-1.9518 xx 10^(4)J`C. work done on the gas is `1.19 xx 10^(7)J`D. Free energy change for the process is `-1.19 xx 10^(7)J` |
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Answer» Correct Answer - A::B reversible process: `W_(rev) = -2.303 nRT log_(10).(p_(1))/(p_(2))` `= -2.303 xx 2 xx 8.314 xx 300 log_(10).(1.01 xx 10^(5))/(5.05 xx 10^(5))` `+ 1.9518 xx 10^(4) "joule"` Since W reversible is a measure of free change `-Delta G = -W_(rev) = -W_(max) = 1.9518 xx 10^(4)J` |
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