A 100ML Sample of 0 $\rarr$ NH₄Cl(aq)
the Temperature Increase Is 2

A 100.mL sample of 0.200 M aqueous hydrochloric acid is added to 100.mL of 0.200 M aqueous ammonia in a calorimeter whose heat capacity (excluding any water) is 480.J/K. The following reaction occurs when the two solutions are mixed. HCl(aq) + NH₃(aq) $\rarr$ NH₄Cl(aq)
The temperature increase is 2.34°C. Calculate $\Delta$ H per mole of HCl and NH₃ reacted.

A) 154 kJ/mol
B) 1.96 kJ/mol
C) 485 kJ/mol
D) -1.96 kJ/mol
E) -154 kJ/mol