Gaseous State

Question 1

What does the Avagadro’s Law state?

Answer 1

The volume, V, of a gas is directly proportional to the amount of gas particles(in mol) at constant temperature and pressure

V₁/N₁ = V₂/N₂

Question 2

What is the standard temperature and pressure and the respective molar volume?

Answer 2

• 0 degree celsius (273K)
• 1 bar (10^5 Pa)
• V_m=22.7dm³

Question 3

What is the room temperature and pressure and its respective molar volume?

Answer 3

• 20 degree celsius (293K)
• 1 atm (101325 Pa)
• V_m=24dm³

Question 4

What does the Boyle’s Law state?

Answer 4

The volume of a fixed mass of a gas is inversely proportional to its pressure at a constant temperature

p₁ V₁=p₂ V₂

Question 5

What does the Charle’s Law state?

Answer 5

It states that the volume of a fixed mass of a gas is directly proportional to its absoulte temperature (in K) at a constant pressure.

V₁/T₁=V₂/T₂

Question 6

What does the Gay-Lussac’s Law states?

Answer 6

The pressure of a fixe dmass of gas is directly proportional to its absolute temperature (in K) at a constant volume.

p₁/T₁=p₂/T₂

Question 8

What is the value of molar gas constant?

Answer 8

8.31(J K^-1 mol^-1)

Question 9

What does the Dalton’s Law state?

Answer 9

It states that the total pressure of a mixture of gases that do not react chemically with one another is the sum of the partial pressure of the constituent gases.

Question 10

What are the assumptions of kinetic theory of gases?

Answer 10

1.There are no intermolecular forces of attraction between particles of an ideal gas.

2. The volume of the ideal gas particles is negligible as compared to the volume of the container.

3. Collisions between particlaes of an ideal gas are perfectly elastic.

4. Gas particles(atoms, molecules) are in rapid, continuous and random motion.
5. The average kinetic energy of the particles is porportional to its absolute temperature measured in Kelvin

Question 11

How does pressure affect the deviation of gases from ideal behaviour?

Answer 11

Gas deviates from ideal behaviour more at a higher pressure as
- volume od containter decreases and the particles are packed closer together
- so the volume of the particles become significant compared to the volume of the containter.

Question 12

How does temperature affect the deviation gases from idea behaviour?

Answer 12

Gas deviates from ideal behaviour more at lower temperature as
- particles have less kinetic energy and will move slower, hence collide with one another with less force.
- This makes IMFOA more significant compared to the forces of intermolecular collisions.