Ideal And Real Gases

Question 1

state variables

Answer 1

variables that we can use to describe the conditions in which a material can exist.

Question 2

Examples of state variables

Answer 2

pressure
volume
temperature

Question 3

equation of state.

Answer 3

An equation of state describes a simple relationship between variables where changes effect each variable

Question 4

m = nM

Answer 4

m = the total mass of a given quantity of a compound.
n = the number of moles present.
M = the molar mass of a compound (the molecular weight)

Question 5

V ∝ n

Answer 5

The volume is proportional to the number of moles

Double the number of moles, whilst keeping the pressure and temperature constant, and you will double the volume.

Question 6

V ∝ 1/p

Answer 6

The volume varies inversely with the pressure

(Double the pressure whilst keeping the temperature and number of moles constant, and you will cause the gas to compress to half its original volume.)

Question 7

p ∝ T

Answer 7

The pressure is proportional to the absolute temperature

(Double the temperature (measured in kelvins) whilst keeping the volume and number of moles constant, then the pressure doubles.)

Question 8

The ideal gas equation

Answer 8

pV =nRT

Question 9

pV =nRT

Answer 9

p = pressure (
V = volume (
n = number of moles
R = molar (ideal) gas constant. R ≃ 8.314 J mol−1 K−1
T = temperature