The work done in adiabatic compression of 2 mole of an ideal monoatomic gas by constant external pressure of 2 atm starting from initial pressure of 1 atm and initial tempreature of 1 atm and initial temperature of 300 K.
(R=`2 cal//mol-degree`)
A. 360 cal
B. 720 cal
C. 800 cal
D. 1000 cal