Question

A gas behaves most like an ideal gas under conditions of:

• A. high pressure and low temperature
• B. high temperature and high pressure
• C. low pressure and high temperature
• D. low pressure and low temperature

Answer 1

The correct option is C low pressure and high temperature

From van der Waals equation
$[P+\frac{a}{V^2}][V-b]=nRT$
At low pressure and high temperature, intermolecular forces become weak and gas behaves like an ideal gas according to the equation.