2. Nitrogen gas contained in a rigid, insulated tank fitted with a paddle wheel, initially at 300K, 0.5 MPa, and a volume of 3 m, is stirred until its temperature is 600 K. Assuming the ideal gas model for the N2, and ignoring kinetic and potential energy, determine (a) the final pressure, in MPa, and (b) the amount of entropy produced, in kJ/K. Solve (b) using 1. Specific heat of N2 varying with temperature 2. Assuming that the specific heat of N2 is constant, Cv = 20.8 kJ/kmol-K Compare the results of 1. and 2. using: % difference = |Value in (2) - Value in (1)| Value in (1) (Hint: you need the moles of N2 in the tank for (b)) State 1 (initial) Paddle P = 0.5 MPa wheel T = 300 K N2 State 2 (final) T = 600 K V = 3 m rigid, insulated wall