Week Six

Question 1

Gases

Answer 1

expand to occupy all the space
free to move
very weak forces

Question 2

Boyles Law

Answer 2

volume is inversely proportional to the total pressure

P1V1=P2V2

Question 3

Charles Law

Answer 3

volume is directly proportional to temp

V1/T1 = V2/T2

Question 4

Avogadros law

Answer 4

gas volume is proportional to the amount of gas

Question 5

ideal gas equation

Answer 5

PV = nRT

Question 6

R

Answer 6

8.314

Question 7

Pressure, Volume moles and temp equation

Answer 7

P1V1/N1T1 = P2V2/N2T2

Question 8

Kinetic energy

Answer 8

1/2mu^2`

Question 9

Average kinetic energy

Answer 9

3RT/2Na
t = temp
Na = avogardos constant
R = gas constant

Question 10

Total amount of gas

Answer 10

n(molecule 1) + n(molecule 2)

Question 11

Gas Density

Answer 11

pM/Rt

Question 12

Dispersion forces

Answer 12

are the attractions between the negatively charged electron cloud of one molecule and the positively charged nuclei of neighbouring molecules

Question 13

Dipole induced dipole forces

Answer 13

stornger than dispersion forces

molecule with permenant dipole induces a dipole in neighbouring molecule

Question 14

dipole dipole forces

Answer 14

attractions between negatively charged end of polar molecules and the positviely charged end of neighbouring polar molecule

Question 15

reactive metal + acid

Answer 15

hydrogen gas and metal salt

Question 16

net ionic equation

Answer 16

only shows the ions which are in reaction not including spectator ions

Question 17

redox reaction

Answer 17

oxidation/ reduction reaction

Question 18

half equations

Answer 18

individual equations of the oxidised and reduced parts

Question 19

Reducing agent

Answer 19

species that reduces the other, is being oxidised

Question 20

Oxidising agent

Answer 20

oxidises the other species, is reduced

Question 21

The activity series

Answer 21

ease of oxidation increases up the table

Question 22

1 pascal

Answer 22

1N/m2

Question 23

standard atmospheric pressure

Answer 23

760mmHg

Question 24

Gay Lussac law

Answer 24

pressure is directly proportional to temp

p1/T1 = P2/T2

Question 25

Daltons law of partial pressure

Answer 25

for unpure gases

Question 26

Ptotal

Answer 26

P1 + P2

Question 27

Ptotal equation

Answer 27

RT/V (n1+n2)

Question 28

X1

Answer 28

(n1RT/v)/ (n1+n2)RT/V

Question 29

using X1 to get total

Answer 29

P1 = X1 x Ptotal

Question 30

Kinetic theory of Gases

Answer 30

physical properties of gases can be explained in terms of motion of indivual particles

Question 31

deviation from ideal behaviour

Answer 31

when pressure is increased or gas is cooled intermolecular forces become significant enough to affect the motion of the molecules and gas wont behave ideally

Question 32

Van der waals equation

Answer 32

van der waals equation slightly lowers the gas pressure

Question 33

pideal = preal + an2/V2

Answer 33

``` a = constant n = moles v = volume ```

Question 34

R constant in Atm, L, mol and K

Answer 34

0.082057L

Question 35

R constant in Pa, m3, mol, and K

Answer 35

8.314J

Question 36

Unknown Molar mass

Answer 36

dRT/P