SOL1-2019.pdf - ECH 152B Winter 2019 Ambarish Kulkarni...

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ECH 152B, Winter 2019, Ambarish Kulkarni & Roland Faller Solution for Homework 1, January 17, 2019 Problem 1. Assume a benzene–toluene mixture obeys Raoult’s law. Calculate (a) y B and P if x B = 0 . 45 and T = 500 K (b) x T and T if y B = 0 . 42 and p = 120 kPa y is the (molar) concentration in the vapor phase, x is the same in the liquid phase. Specify in each case what type of calculation you are doing. (c) Give a short reason why or why not Raoult’s law is a good approximation for this system at these conditions. You have to find the dependence of saturation pressure versus temperature. Always cite all your sources.

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