Positive deviation from ideal behaviour is du | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) The compressibility factor $Z$ for a real gas is given by the van der Waals equation. Positive deviation $(Z > 1)$ occurs when the repulsive force

Vedclass · Accepted Answer

Molecular volume plays dominant role

Vedclass · Answer

(B) The compressibility factor $Z$ for a real gas is given by the van der Waals equation. Positive deviation $(Z > 1)$ occurs when the repulsive forces or the finite volume of gas molecules become significant. In the van der Waals equation $(P + \frac{an^2}{V^2})(V - nb) = nRT$,the constant $b$ represents the excluded volume of the gas molecules. When the pressure is high,the volume of the gas molecules $(nb)$ becomes significant relative to the total volume $V$,leading to $Z > 1$. Therefore,the molecular volume plays a dominant role in causing positive deviation.

Positive deviation from ideal behaviour is due to the fact that

Similar Questions

Which of the following relations between the van der Waals constant $b$ and the radius of a spherical molecule $r$ is correct?

Which statement is correct regarding the equation $Z = PV/RT$?

What is Boyle's temperature? Give its relation with the value of $Z$.

What is the reason for the deviation of pressure from ideal behavior?

$A$ gas such as carbon monoxide would be most likely to obey the ideal gas law at

Vedclass Test Series

Exam Paper Generator

Online Exam Module