caculate amount of energy required to vapourize one mole of water?

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caculate amount of energy required to vapourize one mole of water?

CH4+2O2=CO2+2H2O deltaH=-890kj CH4+2O2=CO2+2H2O deltaH=-802kj

2007-08-17 19:12:02 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry

3 answers

You need the molar heat of vaporization for water, not these heats of reactions.

2007-08-17 19:16:22 · answer #1 · answered by rb42redsuns 6 · 0⤊ 1⤋

I assume that one of the reaction you've given is for liquid water, and the other for vapour - you didn't put the state symbols in. The reactions refer to 2 moles of water, so simply halve the difference bwteen the equations for your answer.

2007-08-18 02:32:23 · answer #2 · answered by Gervald F 7 · 0⤊ 0⤋

you need the states of the reactants and products

2007-08-18 03:27:00 · answer #3 · answered by travis g 3 · 0⤊ 0⤋