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Two mole of an ideal gas is heated at constant pressure of one atmosphere from `27^(@)C` to `127^(@)C`. If `C_(v,m)=20+10^(-2)"T JK"^(-1).mol^(-1)`, then q and `DeltaU` for the process are respectively:A. `6362.8J,4700J`B. `3037.2J,4700J`C. `7062.8J,5400J`D. None of these |
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Answer» Correct Answer - A `w=-nRDeltaT=-2xx8.314xx100` `=-1662.8J` `DeltaU=n intC_(v,m)dT` `=2xxint(20+10^(-2)T)dT` `=2xx20xx(T_(2)-T_(1))+2xx10^(-2)xx((T_(2)^(2)-T_(1)^(2)))/(2)` = 4700 J `4700=q-1662.8` `therefore" "q=6362.8 J` |
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