# 2.1.4.2: Pressure Jump

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When a reaction is sensitive to changes in pressure, the resulting relaxation can be used to determine the rate constant of reaction. If the reaction is then exposed to a sharp increase in pressure, the reaction will then adjust to a new equilibrium which is controlled by the rate constant(s) for the reaction. Thus, by observing the relaxation of the reaction, the rates can be discovered. This can be utilized for biochemical reactions, such as protein-protein interactions, in order to determine their rate constants.