Answer to Question #187929 in Physical Chemistry for Nur

Question

n moles of CO₂ gas (T1, V1) obey a van der Waals equation of state are contained

in an insulated piston-cylinder arrangement. A reversible expansion of the gas is

carried out until the volume become 2V1.

[CV.m = 28.80 J mol-1K^-1, a = 3.610 atm. dm⁶. mol^-2, b = 4.29 x 10-2 dm³. mol^-1]

(a) Find the final temperature of gas as a function of n, 𝐂𝐕.𝐦 , T1, V1 and the van

der Waals parameter a and b.

b) If two moles of CO2 gas involved and T1 = 350K, V1 = 40L, compute final

temperature of the gas.

c) Find work done and internal energy of the gas.(b) (c)

Answer 1

a. 323K

b. 314K

c. 1.6kj