- #1

Lori

## Homework Statement

So, my textbook doesn't go over these type of problems for heat of atomization , so I am 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)

## Homework 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

## 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).