Friday
September 19, 2014

Homework Help: chemistry

Posted by DeeDee on Saturday, November 17, 2012 at 6:38pm.

Use standard enthalpies of formation to calculate ΔHrxn for each reaction. (See the appendix. Enter your answer to the tenth place.)

(a) 2 H2S(g) + 3 O2(g) 2 H2O(l) + 2 SO2(g)

(b) N2O4(g) + 4 H2(g) N2(g) + 4 H2O(g)

(c) SO2(g) + 1/2 O2(g) SO3(g)

These are so easy, but no matter how I do it, the program won't except my answers. Could someone walk me through this?

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