The data below relate to the adsorption of N 2 on rutile (TiO,) at 75K, reduced to standard conditions. Evaluate the constants v, and c . At 75K, Pº = 570 Torr P(Torr ) v(cc) 1.20 235 14.0 559 45.8 649 87.5 719 127.7 790 164.4 860 204.7 950

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Units and Dimensions

Dimensions are the basic concepts of the measurement of quantities. Units are the means of expressing the dimensions. For instance, an area has a dimension of L2 and a unit of m2.