Kinetic Theory - Definitions

Question 1

pV=nRT

Ideal Gas

Answer 1

An ideal gas strictly obeys the equation of state pV=nRT, in which n is the number of moles, T is kelvin temperature and R is the molar gas constant. With the exception of very high densities a real gas approximates well to an ideal gas.

Question 2

Carbon-12

The mole

Answer 2

The mole is the SI unit for the amount of substance. It is the amount containing as many particles as there are atoms in 12g of Carbon-12.

Question 3

Avagadros Constant

Answer 3

This is the number of particles (molecules) per mole of a substance.
Avagadros - 6.02 x 10^23

Question 4

Relative Atomic Mass - Mr

Answer 4

Mass of 1 mole of a substance

Question 5

N

Answer 5

Number of molecules of a substance

N= nNa

Question 6

m

Answer 6

Mass of a molecule

m= M/Na

Question 7

Molar Mass - M

Answer 7

Mass per mole of a gas

M= Mr/1000

Question 8

Absoloute Zero - 0K

Answer 8

The temperature at which the energy of the particles is a minimum
K = Celcius + 273.15

Question 9

R

Answer 9

Molar gas constant
8.31 Mol^-1 K^-1

Question 10

K

Answer 10

Boltzmanns constant
1.38 x 10^-23 JK^-1

K= R/Na

Question 11

C^2

Answer 11

Mean sqaure speed
Speeds squared divided by N number of speeds

Question 12

1/2 mc^2

Answer 12

Mean translocational energy, this is proptional to the temperature.

Any 2 molecules at the same temp will have the same KE