Single Choice

A real gas most closely approaches the behaviour of an ideal gas at :

A$$15$$ $$atm$$ and $$200 K$$
B$$1$$ $$atm$$ and $$273 K$$
C$$0.5$$ $$atm$$ and $$500 K$$
Correct Answer
D$$15$$ $$atm$$ and $$500 K$$

Solution

An ideal gas is a hypothetical gas whose pressure, volume and temperature behaviour is completely described by the ideal gas equation. Actually no gas is ideal or perfect in nature. All gases are real gases. Real gases do not obey the ideal gas laws exactly under all conditions of temperature and pressure.

Real gases deviate from ideal behaviour because of mainly two assumptions of "Kinetic theory of gases".
(i)The volume of a gas particle is negligible compared to the volume of the container (while the real gas particle has some significant volume).
(ii)There is no interaction between gaseous particles (while attraction forces exist between real gas particles).

So at lowest pressure and highest temperature, a real gas most closely approaches the behaviour of an ideal gas.

Hence, the correct option is $$C$$

SIMILAR QUESTIONS

States of Matter - Gas and Liquid

A real gas is expected to exhibit maximum deviations from ideal gas law at:

States of Matter - Gas and Liquid

When is deviation more in the behaviour of a gas from the ideal gas equation $$PV= nRT$$?

States of Matter - Gas and Liquid

I : The ideal gas law does not hold under low temperatures and high pressure. II : Interactions between particles cannot be neglected under these conditions.

States of Matter - Gas and Liquid

For a gas deviation from ideal behaviour is maximum at:

States of Matter - Gas and Liquid

(a) Why do real gases not allow ideal behavior at low temperature and high pressure? (b) Why is glass considered as super-cooled liquid?

States of Matter - Gas and Liquid

When does a gas deviate the most from its ideal behavior ?

States of Matter - Gas and Liquid

Among the following, the correct statement is:

States of Matter - Gas and Liquid

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

States of Matter - Gas and Liquid

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

States of Matter - Gas and Liquid

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

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