Question:
Compressibility factor for hydrogen varies with pressure with positive slope at all pressure.
Even at low pressure, repulsive forces dominate for hydrogen gas.
Compressibility factor for hydrogen varies with pressure with positive slope at all pressure.
Even at low pressure, repulsive forces dominate for hydrogen gas.
Updated On: Jul 2, 2022
- If both assertion and reason are true and reason is the correct explanation of assertion
- If both assertion and reason are true but reason is not the correct explanation of assertion
- If assertion is true but reason is false
- If both assertion and reason are false
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The Correct Option is A
Solution and Explanation
In case of $H$, compressibility factor (Z) increases with pressure. At $273 K , Z>1$, which show that it is difficult to compress the gas as compared to ideal gas. In this case repulsive forces dominate.
Note : For ideal gases, $Z=1$
For real gases $Z \neq 1$
If $Z<1$, negative deviation and the gas is more compressible than expected.
If $Z>1$, positive deviation and the gas is less compressible than expected.
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Concepts Used:
States of Matter
The matter is made up of very tiny particles and these particles are so small that we cannot see them with naked eyes.
There are three States of Matter:
The three states of matter are as follows:
Solid State:
- The solid-state is one of the fundamental states of matter.
- Solids differ from liquids and gases by the characteristic of rigidity.
- The molecules of solids are tightly packed because of strong intermolecular forces; they only oscillate about their mean positions.
Liquid State:
- The molecules in a liquid are closely packed due to weak intermolecular forces.
- These forces are weaker than solids but stronger than that of gases.
- There is much space in between the molecules of liquids which makes their flowing ability easy.
Gaseous State:
- In this state of matter, distances between the molecules are large (intermolecular distance is in the range of 10-7-10-5 cm.
- The intermolecular forces experienced between them are negligible.
- Thus, translatory, rotatory and vibratory motions are observed prominently in gases.