Hi every one

Is enthalpy equal to total energy plus P*V?Why is my calculation（-117282.175+（-0.266*1536116.042）） different from those in the following  
Initial Final Average Std. Dev.
Tot. energy (kcal/mol) -117282.175 -104305.834 -104312.444 650.653
Pot. energy (kcal/mol) -130240.470 -117207.149 -117143.652 327.675
Kin. energy (kcal/mol) 12958.295 12901.315 12831.209 340.470
Tot. enthalpy (kcal/mol) -176157.802 -104689.284 -104396.974 2366.184
Temperature (K) 300.952 299.628 298.000 7.907
Pressure (GPa) -0.266 -0.002 -0.000 0.008
Volume (A^3) 1536116.042 1536116.042 1536116.042 0.000
Density (g/cm^3) 1.126 1.126 1.126 0.000

Thanks in advance.

Sincerely

Zhang