Saturday
May 23, 2015

Homework Help: chem

Posted by c on Thursday, March 13, 2008 at 4:56pm.

Determine whether the following are endothermic or exothermic.

2H2O2 (l) 2H2O(l) + O2(g)
∆H = -190 kj

C(s) + H2O (g) CO (g) + H2 (g)
∆H = +113 kj

C4H9OH(l) + 6 O2(g) 4 CO2(g) + 5 H 2O(g)
∆H = -2456.1

2 C(s) + H2(g) C2H2(g)
∆H = +226.71

N2O5(s) + H2O(l) 2 HNO3(aq)
∆H = -86.0

thanks!

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