Question

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 :)

Answer 1

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

Answer 2

thank you!