The experimental technique of measuring energy changes accompanying any chemical or physical process is called calorimetry. These measurements are generally carried out under 2 condition 1) at constant volume ( ΔU or qv ) 2) at constant pressure ( ΔH or qp) Measurements of ΔU Internal energy change is measured experimentally using an apparatus called Bomb … [Read more...] about Measurement Of Change In Internal Energy and Enthalpy