Posted by Kevin on Friday, March 23, 2012 at 12:17am.
Write the equation.
Balance it.
dH = delta H.
dHrxn = (n*dHf products) - (n*dHf reactants)
I think I need more help. I tried but I think I'm going in circles on this one and not thinking clearly at this point.
Look in your text, usually in the back of the book, and find the delta H formation values for these compounds/elements at 25 C. I think the value for liquid water, although I'm not sure, is about -285 kJ/mol. The value for elements is arbitrarily assigned zero.
So 2H2(g) + O2(g) ==> 2H2O(l)
Then dHrxn = (2*dHf H2O) - (2*dHf H2 + dHf O2)
Solve for dH rxn and that will be for 1 mol H2. Then scale it up to 1000 g H2.
Related Questions
Chemistry - Hi. I need some help with this. When you stretch a balloon against ...
chemistry - Consider the following reaction: 2H2 (g) + O2 (g)  2H2O...
Chemistry - One mole methane is completly burned in xcess oxygen. If 8.90x10^3kj...
physics - Einstein saud that the amount of energy in matter is given by E=mC^2 ...
Chemistry - When one pound of gasoline (made up of compounds of hydrogen and ...
earth - Atmosphere Homework! 1.Which of the following layers of the atmosphere ...
Chemistry - Calculate the partial pressure of monatomic hydrogen in hydrogen gas...
College Physics - The rms speed of the molecules in 1.7 g of hydrogen gas is ...
chemistry - in the reaction between sodium and water, hydrogen gas is given off ...
Chemistry - Calculate the partial pressure of monatomic hydrogen in hydrogen gas...
For Further Reading
