Answer to Question #233252 in Organic Chemistry for Jese Junior

Question

Explain the working principle of constant volume and constant pressure calorimeters

Answer 1

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 ).