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September 3, 2015

Homework Help: Chemistry

Posted by Jasmine on Tuesday, May 15, 2012 at 8:38pm.

Given the following thermochemical data:
1) C(s) + O2(g) -> CO2(g) ∆H = -393.5 kJ
2) H2(g) + 1/2 O2(g) -> H2O(l) ∆H = -285.8 kJ
3) 3 C(s) + 3 H2(g) -> C3H6(g) ∆H = +20.4 kJ
4) C3H6 (cyclopropane)(g) -> C3H6(propene)(g) ∆H = -33.0 kJ

What is the ∆H for the following reaction?
C3H6 (cyclopropane)(g) + 9/2 O2(g) -> 3CO2(g)∆H = ______.

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