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Chemistry 20 Online
OpenStudy (anonymous):

in contact process which reaction is endothermic and which is exothermic

OpenStudy (aaronq):

"in contact process"?

OpenStudy (wolfe8):

http://en.wikipedia.org/wiki/Contact_process Endothermic will have a positive enthalpy change and the exothermic will have a negative one. You now just need to find the enthalpy change in the processes. I believe you can Google that.

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