An ideal gas undergoes adiabatic expansion against constant external pressure. Which of the following is incorrect.

An ideal gas undergoing adiabatic expansion obeys the relations

An ideal gas undergoes isothermal expansion at constant pressure . During the process.

An ideal gas undergoes isothermal expansion at constant pressure . During the process.

An ideal gas undergoes isothermal expansion at constant pressure . During the process

One mole of an ideal gas is subjected to adiabatic expansion form initail state of (10"atm",300K) to final pressure of 1 atm against constant external pressure. Which of the following option contain correct change in thermodynamic parameters for the above process. (Given: gamma=(4)/(3))

The work done by a system in an expansion against a constant external pressure is :

In an adiabatic expansion of ideal gas: