Ideal Gases

Question 1

Boyle’s Law

Answer 1

pressure is inversely proportional to volume provided temperature is constant

P∝1/V so PV=constant

Question 2

Pressure Law

Answer 2

If mass and volume are constant, the pressure of a gas if directly proportional to its absolute temperature

P∝T so P/T=constant

Question 3

Charles’ Law

Answer 3

If pressure remains constant, the volume of a gas is directly proportional to its absolute temperature

V∝T so V/T=constant

Question 4

Kinetic Model/Theory of Gases

Answer 4

> number of atoms/molecules is very large (e.g. mole) and in random motion/speed
atoms occupy negligible volume (compares to volume of gas)
negligible forces between atoms (except during collision)
collisions between atoms (or with container) are perfectly elastic and negligible time for collisions (compared to time between)

Question 5

no. of moles

Answer 5

mass/molar mass

Question 6

no. of particles

Answer 6

no. of moles x Avogadro