Problem- Calculate the work done by the system during an isothermal reversible expansion of 3 moles of a gas that obeys to the following equation of state
p=nrt/v-nb
knowing that: (a) At T = 120 K, the gas expands from 15.0 dm3 to 25.0 dm3; (b) b = 0.038577 dm3.mol-1
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