Homework Help: chemistry

Posted by paneet on Tuesday, November 24, 2009 at 8:42pm.

Given the thermochemical equation SO2(g) + ½ O2(g) ---> SO3 (g) DH = -99.1 kJ
calculate the enthalpy change (DH) when 89.6 g of SO2 is converted to SO3.
1. 69.3 kJ
2. -111 kJ
3. -139 kJ
4. 139 kJ
5. -69.3 kJ

i got -139 kj
but im so unsure may some one confirm it for me?

chemistry - DrBob222, Tuesday, November 24, 2009 at 8:55pm
Looks ok to me.

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