Bomb calorimeter: constant volume, measures $delta_U$ (= qv). q = $C_{cal}$ * $delta_T$, where $C_{cal}$ = heat capacity of calorimeter. Convert to $delta_H$ using $delta_H$ = $delta_U$ + $delta_{ngas}$*RT. Coffee-cup calorimeter: constant pressure, measures $delta_H$ (= qp) directly. q = m * c * $delta_T$, where m = mass of solution, c = specific heat $\frac{4.184 J}{g.K for water}$. For neutralisation: q = total mass * 4.184 * $delta_T$. $delta_H$ = -q/moles (negative if temperature rises, indicating exothermic).