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Hess' Law Question

Hi, I'm struggling on a question related to Hess' law. I just can't seem to get the maths right.


CH4(g) + H2O(g) --> CO(g) + 3H2(g)
Use the data below to calculate the enthalpy change for the forward reaction.


CO(g) + 1/2O2(g) --> CO2(g) ΔH=-283kJmol-1

H2(g) + 1/2O2(g) --> H2O(g) ΔH=-242kJmol-1



Original post by lmil
Hi, I'm struggling on a question related to Hess' law. I just can't seem to get the maths right.


CH4(g) + H2O(g) --> CO(g) + 3H2(g)
Use the data below to calculate the enthalpy change for the forward reaction.


CO(g) + 1/2O2(g) --> CO2(g) ΔH=-283kJmol-1

H2(g) + 1/2O2(g) --> H2O(g) ΔH=-242kJmol-1


Care to show your working?
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lmil
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Original post by charco
Care to show your working?


So far there is none. I just keep crossing things out!

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