Question

What is the pressure of CO2 at 325 K, if it is given that pressure at 330 K is 6 Pa, and pressure at 320 K is 4 Pa?

(a) 4.5 Pa

(b) 5 Pa

(c) 5.5 Pa

(d) 6 Pa

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Question is from Modeling and Predicting Vapor Pressure topic in division Real Gases: Equations of State, Single Component Two Phase Systems, Saturation & Condensation of Basic Chemical Engineering

Answer 1

Correct option is (b) 5 Pa

Explanation: Using linear interpolation, P325K = 4 + (325 – 320)*(6 – 4)/(330 – 320) = 4 + 5*2/10 = 5 Pa.