Homework Help: college chemistry

Posted by bennett on Monday, November 3, 2008 at 11:25am.

The chemical reaction representing production of water gas is as follows:

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

calculate the enthalpy change in the production of 200L(at 500mmHg and 65degree celcius) of hydrogen by this reaction.

college chemistry - bobpursley, Monday, November 3, 2008 at 11:47am
I think temperature will be a factor. Ignoring that
figure the moles of H2, and the moles of CO2, and the moles of H2O(l).

ChangeEnthalpy=HformationCO*molesCO -HeatformationH2O*molesH20

Now the problem. Heat of Formation is given in tables at some standard temperature, usually 273K. I hate to tell you to ignore that, as it is significant.
- college chemistry - bennett, Monday, November 3, 2008 at 12:12pm
  so would i find the moles using the ideal gas law? PV=nRT
  i didn't understand the heat of formation? could you explain a little more? thanks

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