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December 19, 2014

Homework Help: chemistry

Posted by timmy on Monday, January 23, 2012 at 8:05pm.

Calculate the value of DHo for the reaction 2 CH4 (g) -> C2H6 (g) + H2 (g) given the following thermochemical equations:
C2H2 (g) + H2 (g) -> C2H4 (g) delta = 175.1 kJ

C2H6 (g) -> C2H4 (g) + H2 (g) Delta = + 136.4 kJ

C2H2 (g) + 3 H2 (g) -> 2 CH4 (g) Delta = 376.8 kJ

a) + 65.3 kJ
b) + 338.1 kJ
c) 415.5 kJ
d) + 688.3 kJ
dont understand help!

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