1. One mole of an ideal gas at 10 atm pressure is contained in a vessel at 300K. The gas is expanded till the pressure becomes 2 atm and the temperature reaches 400K. Calculate the work done on the system and the heat absorbed by it if the change is brought about by the following processes: A] The gas is expanded isothermally against a constant external pressure of 2 atm, then heated to the desired temperature at constant volume, and finally expanded till the final state is reached. B] The gas is expanded by an isothermal reversible process, then heated to 400K, and again expanded reversibly till he final state is reached. C] The gas is first heated in an isochoric process and then expanded reversibly in an isothermal process.

Elements Of Electromagnetics
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1. One mole of an ideal gas at 10 atm pressure is contained in a vessel at 300K. The gas is expanded till the pressure becomes 2 atm and the temperature reaches 400K. Calculate the work done on the system and the heat absorbed by it if the change is brought about by the following processes:

A] The gas is expanded isothermally against a constant external pressure of 2 atm, then heated to the desired temperature at constant volume, and finally expanded till the final state is reached.
B] The gas is expanded by an isothermal reversible process, then heated to 400K, and again expanded reversibly till he final state is reached.
C] The gas is first heated in an isochoric process and then expanded reversibly in an isothermal process.

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