Homework Help: Chemistry calorimeter.. please help!

Posted by samantha on Wednesday, February 27, 2013 at 10:22pm.

A coffee cup calorimeter contains 100ml of .200M H2SO4 at 22.3 degrees Celsius. When 2.16g Mg is added, the temperature rises to 36.3 degrees Celsius. What is the heat of the reaction per mole Mg?

Please help and show steps. Much appreciated :)

Chemistry calorimeter.. please help! - DrBo222, Thursday, February 28, 2013 at 12:11am
Mg + H2SO4 ==> MgSO4 + H2

qrxn = mass H2O x specific heat H2O x (Tfinal-Tinitial)

per gram is qrxn/2.16 g Mg.
per mol Mg is (qrxn/2.16) x molar mass Mg
Chemistry calorimeter.. please help! - samantha, Thursday, February 28, 2013 at 10:55am
thank you!

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