H0NH3 = -11020; // cal/moleN2
H0H2 = 0;
HN2 = 0;
CpNH3 = 8.92;// cal/moleH2.K
CpH2 = 6.992;// cal/moleN2.K
CpN2 =6.984;// cal/moleNH3.K
T = 423; //K
TR = 298; //K