CHM2131 Assignment 2 2016

# CHM2131 Assignment 2 2016 - CHM2131 Thermodynamics of Gases...

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CHM2131: Thermodynamics of Gases and Solutions Assignment 2 2016 Ideal and Real Gases Due: Friday Sept. 23 1. At sufficiently high temperatures, the van der Waals equation has the form: 𝑝 = 𝑅𝑇 𝑉 𝑚 −? Justify this behaviour using a potential energy diagram (like the figure on slide 41 of the lecture notes). 2. a) What is the significance of the Boyle Temperature ? b)Determine the Boyle Temperature for N 2 gas assuming it is well described by i) the van der Waals equation of state and ii) the virial equation of state. c) Under what temperature and pressure conditions will attractive forces dominate the behaviour of a sample of nitrogen gas? 3. The experimental critical constants of NH 3 are: T c =405.4 K, P c = 113.53 bar, and V mc = 72.5x10 -3 l mol -1 . Use the values of P c and T c to calculate V mc assuming NH 3 behaves as (a) and ideal gas; (b) a VDW gas and (c) a Redlich-Kwong gas at the critical point (you may need to use a computer or a programmable
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• Fall '09
• Ben
• Thermodynamics, Fundamental physics concepts, Boyle Temperature

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