The vapor pressure of refrigerant R134a can be approximated with the Antoine equation ?with P in kPa and T in K, A = 14.41 kPa, B = 2094 kPa ? K, and C = ?33.06 K. The critical temperature is T_c?= 374.21 K. Calculate the acentric factor. Is this molecule more or less acentric than that of water if the acentric factor of water is ?_H2O?= 0.3443?

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In psat = A B T + C