O2 = concentration of oxygen, in percentage volume, to the H2 = concentration of hydrogen, in percentage volume, to the u = velocity of the gas stream in the reactor L i t e r a t u r e Cited Broom, T. Adv. Phys. (Phil. Meg. Suppl.) 1954, 3 , 26. Damask, A. C.; Dienes, G. J., "Polnt Defects In Metals"; Gordon and Breach: Duell, M. J.; Robertson, A. J. Trans. Faraday Soc. 1861, 57, 146. Rajagopalan, K.; Sheintuch, M.; Luss, D. Chem. Eng.An empirical equation which employs the critical temperature T,, K, and the normal boiling point T,, K, to predict the critical pressure P, for organic substances has been obtained. This equation accurately predicts the values of P, for organic compounds including the various isomers in the families alkanes, alkenes, aromatics, alicyclic hydrocarbons, alkyl ethers, and alkyl ketones. Rastogi, Head of the Chemistry Department, Gorakhpur University, for encouragement. Thanks are also due to the University Grants Commission, New Delhi, for financial support.
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