Solving a problem in physics section 32 point 93 molecu

93. Nitrogen mass m = 50 g is at a temperature T1 = 280 K. As a result, isochoric cooling, the pressure was reduced to n = 2 times, and then the resulting isobaric expansion temperature of the gas in the final state was equal to the original. Determine: 1) the work performed by the gas; 2) the change in internal energy of the gas.