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### 11.77/11.87 6th Edition

Posted: Mon Jan 14, 2019 10:47 pm
Why is $X_{2}\rightleftharpoons 2X$ an endothermic reaction? Shouldn't it be exothermic because enthalpy decreases/it is a catabolic reaction?

### Re: 11.77/11.87 6th Edition

Posted: Mon Jan 14, 2019 11:45 pm
Since it requires energy to break the X-X bond, the reaction is considered to be endothermic. Hope that helps!