When a 9.92-g sample of gaseous hydrogen bromide dissolves in 45.5 g of water in a coffee-cup calorimeter (see above figure) the temperature rises from 25.00 oC to 69.79 oC. Calculate H in kJ per mol of HBr for the solution process.
HBr(g) H+(aq) + Br-(aq)
The specific heat of the solution is 4.184 J/g-K.
a) H = -69.6 kJ/mol.
b) H = 3380 kJ/mol.
c) H = 8530 kJ/mol.
d) H = -84.7 kJ/mol.
e) H = 84.7 kJ/mol.