Heat absorbed by calorimeter = (heat capacity of
calorimeter)(Tf - Ti)
                                                  Â
= (3.090 kJ / K)*(0.300 K)
                                                  Â
= 0.927 KJ
molar mass of RbBr = 165.37 g/mole.
moles RbBr = 7.00 g / 165.37 g
                   Â
= 0.0423 moles.
= 0.927 kJ heat / 0.0423 moles RbBr = +21.9 kJ / mole of
RbBr
molar heat of solution of RbBr = +21.9
KJ
