Hey there, I am trying to model engine combustion dynamics on MatLab using basic physical laws. My code starts bugging just at the start of the Power Stroke. The pressure value shoots off to 60 bars right at the start. I tried narrowing down the error and I think i have a problem at the zero Kelvin enthalpy values of the constituents of the combustion mixture. Can anyone state here the Zero Kelvin enthalpies of CO2, CO and H2O. P.S. I dont really understand the concept of Enthalpy at Zero Kelvin. Would appreciate if someone helps me there too. :) Thanks!