Prediction of a low-density binary diffusivity. Estimate DAB for the system methane-ethane at 293K and 1atm by the following methods: (a) Equation 17.2-1. (b) The corresponding-states chart in Fig. 17.2-1 along with Eq. 17.2-3. (c) The Chapman-Enskog relation (Eq. 17.3-12) with Lennard-Jones parameters from Appendix E. (d) The Chapman-Enskog relation (Eq. 17.3-12) with the Lennard-Jones parameters estimated from critical properties. Answers (all in cm2/s ): (a) 0.152 (b) 0.138 ; (c) 0.146 ; (d) 0.138 Prediction of a low-density binary diffusivity. Estimate DAB for the system methane-ethane at 293K and 1atm by the following methods: (a) Equation 17.2-1. (b) The corresponding-states chart in Fig. 17.2-1 along with Eq. 17.2-3. (c) The Chapman-Enskog relation (Eq. 17.3-12) with Lennard-Jones parameters from Appendix E. (d) The Chapman-Enskog relation (Eq. 17.3-12) with the Lennard-Jones parameters estimated from critical properties. Answers (all in cm2/s ): (a) 0.152 (b) 0.138 ; (c) 0.146 ; (d) 0.138