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August 28, 2015

Homework Help: AP Chemistry

Posted by Anonymous on Sunday, September 27, 2009 at 4:31pm.

C2H2(g) + 2H2(g) --> C2H6(g)

Information about the substances involved in the reaction represented above is summarized in the following table:

C2H2(g) 226.7 kj/mol
C2H6(g) -84.7 kj/mol
[the values are the change in enthalpy]

a. write the equation for the heat formation of C2H6.
b. Use the above information to determine the enthalpy of reaction for the equation given.

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A, for some reason, is throwing me off. I don't know what it's asking. Help?

Thanks!

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