Homework Help: Chemistry

Posted by Tabetha on Monday, May 18, 2009 at 5:40pm.

Here's a molar heat problem I just have one question on. How much heat will be transferred if 2 moles of hydrogen reacts with excess oxygen according to the reaction below?

2H2 + O2 yields 2H20 + 572 kJ

The answer according to my answer key is

2 mole H2 x 572 kJ/2moles H2.

I understand where the first 2 moles comes from, but what about the second one on the bottom of the equation? I heard there's a chart online that tells you where to find this value. Could you show me a link if there's a such chart? Thanks for your help!

Chemistry - DrBob222, Monday, May 18, 2009 at 5:48pm
http://en.wikipedia.org/wiki/Standard_enthalpy_change_of_formation_(data_table)
I answered the first post but I don't see it now.

Answer this Question

Related Questions

Chemistry - I have to solve this combustion problem using Dimensional Analysis ...
Chemistry - Heat of Fusion - When water is frozen into ice cubes in the freezer...
chemistry - Consider the following reaction: 2H2 (g) + O2 (g)  2H2O...
chem - How much heat is required to raise the temperature of 200 g CH3OH from 20...
chemistry - CH3OH(g) ----> CO(g) + 2H2 (g) (delta H =+90.7k) A) is heat ...
Chemistry II - The total volume of hydrogen gas needed to fill the Hidenbrug was...
Molar heat of combustion question! - Calculate the molar heat of combustion of ...
Physics - n a running event, a sprinter does 5.5 105 J of work and her internal...
science - I guess I'm missing something here...but I've approached this ...
chemistry - How much heat is required to raise the temperature of 200 g CH3OH ...

For Further Reading

First Name:
School Subject:
Answer: