Gas law

Question 1

Pressure

Answer 1

Units of pressure
1atm= 101.3kPa=760mmHg=760 Torr= 14.7
Force per unit area

Question 2

Pressure

Answer 2

Rate of molecular collision

Question 3

Temperature

Answer 3

Average molecular speed

Question 4

Gas Laws Boyle

Answer 4

PV=k
P1V1 = P2V2
P = pressure
V=volume
k=constant at a specific temp

Question 5

Ideal gas behaviour

Answer 5

V is inversely proportional to P, if we graph it and straight line shows.

Question 6

Charles’ Law

Answer 6

Volume and temperature are proportional with a fixed amount of gas
V1/T1= V2T2

Question 7

Avogadro’s Law

Answer 7

Volume is proportional to the Number of moles of gas at Constant P and T
V1/n1=V2/n2

Question 8

Ideal Gas Law

Answer 8

PV = nRT

Question 9

Molar mass of a gas

Answer 9

n= mass/molar mass = m(g)/ MW
P=nRT/V = mRT/molar mass V= dRT/ Molar Mass

Question 10

Vapour Pressure

Answer 10

The pressure that results from a liquid when
rate of evaporation = Rate of condensation in a closed container
Temperature Dependent

Question 11

Kinetic Molecular Theory of Gases

Answer 11

• Volume of each particle can be neglected
• Pressure results from the particle’s collision against the walls of the container
• Particles do not exert forces onto another
• Average kinetic energy of a gas particle is directly proportional to the temperature

Question 12

Roots mean square velocity

Answer 12

Average of the squared velocity of the particles

u^2

Question 13

Maxwell distribution law

Answer 13

Average distance a particle travels between collisions

Collision between particles = large range in velocity

Question 14

Effusion

Answer 14

Measures rate at which the gas is transferred into the chamber
Rate of effusion of gas 1/ Rate of effusion gas 2 = square root molar mass 2 / square root molar mass 1

Question 15

Collision with container walls

Collision rate

Answer 15

Depends on
Particle speed (Uavg)
Area (A)
Particle Density (# of particles / Volume = N/V)

Question 16

Ideal gas

Answer 16

behave ideally at low P/ High T

1. Negligible particle Volume
2. NO inter particle forces (attraction/Repulsion)
3. Plot of PV/nRT vs P is unity = 1

Question 17

Ideal Behaviour in real gases

Low temp

Answer 17

-Few particles per unit volume
-Volume of particles is negligible compared to the volume of the container
- Interactions are minimized
Behaves more like ideal gas at low pressure

Question 18

Ideal Behaviour in real gases

Gas at high temp

Answer 18

Less interaction, particles move further apart, larger volume
at low temp, volume decreases, particles closer together
Real gas behaves more like an ideal gas at high temp