Question

Which of the following statements concerning real gases is/are CORRECT?1. Real gases are always liquids or solids at temperatures below 273.15 K.2. The pressure of a real gas is higher than predicted by the ideal gas law.3. The molecules in a real gas are attracted to each other.A) 1 onlyB) 2 onlyC) 3 onlyD) 2 and 3E) 1, 2 and 3

Answer 1

Answer:

(C) 3 only (The molecules in a real gas are attracted to each other).

Explanation:

Real gas: The non-hypothetical gases whose molecules occupy space and have interactions and which doesn't obey gas laws at all temperatures and pressures is called real gas

Properties of real gases are as follow:

• Gas particles are in constant, random motion.
• Collisions are non-elastic that is it loses energy with collisions.
• Gas pressure is caused by collisions of gas molecules against the wall of the container.
• Real gases differ from ideal gases is that the molecules of a real gas are attracted to each other.
• Real gas definite volume and has mass.
• The pressure is high in ideal gas compared to real gas.

Hence, the correct option regarding real gases from the given question is an option (C).

Answer 2

The statement which is true about the real gas is that the molecules in a real gas are attracted to each other.

Option (C) 3 only is the correct option.

What are real gases?

Real gases are non-ideal gases with molecules that occupy space and interact, and they do not follow the ideal gas rule.

The molecules of a real gas are more attracted to each other than ideal gases.

The particles of real gases are always in constant and random motion.

It looses energy with collision.

The pressure in real gases are lower than ideal gases.

Thus, the correct option is (C)The molecules in a real gas are attracted to each other.  

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