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For an ideal gas
  • AThe change in internal energy in a constant pressure process from temperature $T_1$ to $T_2$ is equal to $nC_v (T_2 -T_1)$ where$C _v$ is the molar specific heat at constant volume andnis the number of the moles of the gas.
  • B
    The change in internal energy of the gas and the work done by the gas are equal in magnitude in an adiabatic proces.
  • C
    The internal energy does not change in an isothermal process.
  • D$A, B$ and $C$
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