The constant pressure molar heat capacity of NH3(g) is given by Cp,m= a - bT + c/T2, where a, b, c are constants that determine how the heat capacity of NH3(g)varies with temperature. Determine the change in the entropy when 2 moles of NH3(g) at T1= 350K and 1.00 bar is heated toT2= 750K, resulting in a pressure decrease of 0.20 bar.