Help! Calculate the value of ΔH° for each of the following reactions?
I'm having so much trouble, I've been trying for an hour and can't get it! I don't know the standard enthalpies for all them.
4 NH3(g) + O2(g) → 2 N2H4(g) + 2 H2O(l)
3 Fe(s) + 4 CO2(g) → 4 CO(g) + Fe3O4(s)
NaOH(s) + CO2(g) → NaHCO3(s)
Please help.
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Go here for enthalpies:
http://webbook.nist.gov/chemistry/
Enter the formula and click the phase you want. Try NH3 and click 'gas phase.' Then, click search.
Pick ammonia (NH3) and no the ND3 one.
Scroll do a bit for the value. Pick -45.90.
It won't work with all of them. You'll have to search. For example, I got NaHCO3 to be -947.7 kJ/mol
https://www.google.com/search?q=NaHCO3+standard+en...
About the 7th link down, not including the indented ones.