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July 23, 2014

Homework Help: 12 Chemistry

Posted by Chase (sorry if this long) on Saturday, March 29, 2008 at 10:58am.

What is the molar enthalpy of combustion of magnesium? This was the lab question that I was asked to find after performing a lab based on Hess' law. I can't find anywhere in my notes how to calculate this, and the text book doesn't explain their steps properly, and I have different information than the book does. I was wondering how to go about doing this? I am wondering, is the enthalpy change the same thing? I know how to calculate the enthalpy change, where you break up the question into parts finding molar mass, and then using delta H= mct/n but I am not sure if this is the same thing.

Thanks.

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