[Twoacross]

So here it is:

Water gas, a mixture of carbon monoxide and hydrogen, is produced by treating carbon (in the form of coke or coal) with steam at high temperatures.

C(s) + H2O(g) ==> CO(g) + H2(g)

Not all the carbon available is converted to water gas as some is burned to provide the heat for the endothermic reaction of carbon and water. What mass of carbon (give units) must be burned (to CO2 gas) to provide the heat to convert 1.00 kg of carbon to water gas?

Now ive hit a brick wall, i cant find it within me to know how to do this, i can take the mass of the carbon and then now the mass of the water gas and such but to CO2 gas? using the enthalpies i found might not have a role in this question but im in need of advice and help of course on how to solve this question

All feedback is appreciated!

[Borek]

You need these enthalpies. Start solving easier problem: how much energy is required to convert 1 kg of coal to water gas?

Where does this energy come from?

[fledarmus]

And you are missing one of your chemical reactions - you've only accounted for the water gas part of the problem.