1. The problem statement, all variables and given/known data So, my textbook doesn't go over these type of problems for heat of atomization , so im confused on how to write the chemical equations for them. Question: The heat of atomization is the heat needed to separated gaseous atoms from a substance in its standard state. The equation for the atomization of graphite is C(graphite) --> C(gas) 2. Relevant equations Given, 1) Heat of formation for CH4 = -74.9 Kj/mol 2)Heat of atomization for CH4 = 1660 kj/mol 3) heat of atomization for H2 = 423 kj/mol 3. The attempt at a solution For the equation number 1, i got C(graphite) + 2H2 -> CH4(s) for number 2, i got C(graphite) + 4H -> C(g) + H(g) For 3, i got 1/2H2(g) --> H(g) I'm not sure if the second one is write. I was thinking that if i was able to write the equations correctly, then i can do some cancellation so i get C(graphite) --> C(gas).