Asked by ryno

From the enthalpies of reaction
2C(s)+O2(g)¨2CO(g)ƒ¢H=−221.0kJ
2C(s)+O2(g)+4H2(g)¨2CH3OH(g)ƒ¢H=−402.4kJ
calculate ĢH for the reaction
CO(g)+2H2(g)¨CH3OH(g)

Answers

Answered by DrBob222
Reverse equation 1 and add to equation 2. Divide the final equation by 2.
Add the dH values; when an equation is reversed, change the sign of dH.
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