At standard temperature and pressure, what is the heat of formation of water vapor?
Heat of formation for
H2O from H2 and O2 is -68.32 Kcal/Mol
The latent heat of evaporation is -600 ca/g
Heat of formation for a mole of water vapor: -241.82 kJ
How is this a brain teaser? And the phrase "at standard temperature" seems very odd to me in this circumstance, but it's been a while since I've considered this sort of stuff.
too late, but i would say its -241.8 KJ/mol of H2O(g) produced , which is the same as meteor's answer.
NateTG with the point!
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