Question: what is the difference between constant pressure and constant volume calorimetry?
Answer: Constant-Pressure Calorimetry A constant-pressure calorimeter measures the change in enthalpy of a reaction occurring in a liquid solution. ... In contrast, a bomb calorimeter 's volume is constant, so there is no pressure-volume work and the heat measured relates to the change in internal energy (ΔU=qV Δ U = q V ).