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For same change in volume of ideal gas, decrease in internal energy is more in adiabatic expansion than in isobaric expansion if expansion starts with same intial state.

During boiling of ${\mathrm{H}}_2\mathrm{O}$ at 1atm, ${100}^{\circ }\mathrm{C}$ kinetic energy of ${\mathrm{H}}_2\mathrm{O}$ molecules increases.

For same change in temperature of ideal gas through adiabatic process, magnitude of W will be same in reversible as well as irreversible process.

During adiabatic expansion of an ideal gas, magnitude of work obtained is equal to $∆\mathrm{H}$ of gas.