" Work done in adiabatic process is "

Two moles of helium gas (gamma=(5)/(3)) at 27^(@)C is expanded at constant pressure until its volume is doubled. Then it undergoes an adiabatic change until the temperature returns to its initial value. The work done during adiabatic process is ________ (universal gas constant = 8.3 "J mol"^(-1)K^(-1) )

Derive an expression for work done in adiabatic process.

The initial temperature of a two mole monoatomic gas is T. If temperature increases to 3T then work done in the adiabatic process is

Obtain an expression for the work done in a adiabatic process.