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October 1, 2014

Homework Help: chemistry

Posted by DeeDee on Friday, November 16, 2012 at 11:02pm.

NH4NO3(s) NH4+(aq) + NO3−(aq)

In order to measure the enthalpy change for this reaction above, 1.07 g of NH4NO3 is dissolved in enough water to make 25.0 mL of solution. The initial temperature is 25.8C and the final temperature (after the solid dissolves) is 22.4C. Calculate the change in enthalpy for the reaction in kJ. (Use 1.0 g/mL as the density of the solution and 4.18 J/g C as the specific heat capacity.)

We've been doing a lot of energy problems, but I'm not sure how to begin this one. I don't want the answer, just the set up so I know what I'm doing. Thanks. :)

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