The acentric factor can be mathematically expressed as (a) (omega=-1-left.log _{10} P_{r}^{text {sat }} ight|_{T_{r}=0.7}) (b) (omega=1-left.log

The acentric factor can be mathematically expressed as

(a) \(\omega=-1-\left.\log _{10} P_{r}^{\text {sat }}\right|_{T_{r}=0.7}\)

(b) \(\omega=1-\left.\log _{10} P_{r}^{\text {sat }}\right|_{T_{r}=0.7}\)

(c) \(\omega=-1+\left.\log _{10} P_{r}^{\text {sat }}\right|_{T_{r}=0.7}\)

(d) None of these.