Question

Under which conditions of temperature and pressure does a sample of neon behave most like an ideal gas?

Answer 1

Since real gases behave least ideally at low temperature and high pressure, they would behave most like an ideal gas at high temperature and low pressure.
 Therefore, (3) 400K and 0.25 atm is the correct answer.
Hope this would help~

Answer 2

Answer : The correct option is, (3) 400 K and 0.25 atm

Explanation :

The conditions for ideal gas are :

Ideal gas are those gas that has no intermolecular attractions.

Ideal gas are those gas that have negligible volume.

The ideal gas equation is,

$PV=nRT$

The conditions for real gas are :

Real gas are those gas that have intermolecular attractions.

Real gas are those gas that have volume.

The real gas equation is,

$(P+\frac{an^2}{V^2})(V-nb)=nRT$

A real gas behave ideally at high temperature and low pressure condition.

From the given options, option (3) have high temperature and low pressure is the correct option.

Hence, the 400 K and 0.25 atm conditions of temperature and pressure does a sample of neon behave most like an ideal gas.