3 mole of nitrogen initially at 300 K and 10 atm expands irreversibly and adiabatically against a co — AITS & Test Series Chemistry Question

Question

3 mole of nitrogen initially at 300 K and 10 atm expands irreversibly and adiabatically against a constant pressure of 1 atm. Calculate the final temperature of the gas (Cp = 29.133 K^-1).