Module 5 - 5.1.4 Ideal Gases

Question 1

Monatomic (definition)

Answer 1

Comprised of single atoms

Question 2

1 mole of a substance contains

Answer 2

6.02x10^23 particles

Question 3

An Ideal Gas (definition)

Answer 3

A gas that has internal energy only in the form of random kinetic energy

Question 4

Real gases behave like an ideal gas if (2)

Answer 4

• the temperature is well above its boiling point
• the pressure is low so that the particles are far apart

Question 5

Assumptions of the Kinetic Model of a Gas (6)

Answer 5

• the gas contains a large number of particles
• the particles move rapidly and randomly
• all collisions are perfectly elastic
• there are negligible attractive forces between particles except during collisions
• the time for a collision to happen is negligible compared to the time between collisions
• particles have a negligible volume compared with the volume of gas in the container

Question 6

Boyle’s Law

Answer 6

• pressure ∝ 1/volume
• temperature is constant

Question 7

Charles’ Law

Answer 7

• volume ∝ temperature
• pressure is constant

Question 8

Pressure-Temperature Law

Answer 8

• pressure ∝ temperature
• volume is constant

Question 9

pV = nRT and pV = NkT
what is n and what is N

Answer 9

• n = number of moles
• N = number of molecules

Question 10

For ideal gases: T ∝

Answer 10

Ek and internal energy
- since gases have negligible potential energy

Question 11

All gases at the same temperature have

Answer 11

the same kinetic energy