In the present paper, a model with two adjustable parameters is developed to study the viscosity of liquid as a function of pressure. The model so developed has been applied in 38 liquids. The computed results have been found to be in very good agreement with the experimental data in case of each liquid. The minimum and the maximum ranges of viscosity studied in the present paper are 0.0540.515cp in CO2 and 16.957200.0cp in 2-ethylhexyl-benzoate, respectively. It is interesting to note that the relation is found valid even in the liquid in which the viscosity varies by a factor of 3400, i.e., 2-ethylhexyl-benzoate.

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