A quantity of 200 mL of 0.862M HCLis mixed with 200mL of 0.431M Ba(OH)2 in a constant-pressure calorimeter of negligible heat capacity. The initial temperature of the HCL and Ba(OH)2 solutions is the same at 20.48C. For the process
H+(aq) + OH-   --------->  H2O(l)
the heat of neutralization is -56.2kJ/mol. What is the final temperature of the mixed solution?
How to calcula the enthalpy change in different M??

可唔可以列出1同2既式呀???
THX~~~~~