Kinetic Theory 3.3

Question 1

Ideal Gas Laws of Boyle and Charles: (Formula)

Answer 1

p X v / T

Question 2

State dalton’s law?

Answer 2

The pressure of mixtures of gasses is equal to the sum of the pressures of the individual gas components.

Question 3

Brownians Motion?

Answer 3

the random motion of smoke particles in a gas.

Question 4

Graham’s Law?

Answer 4

rate of diffusion of a gas is inversely proportional to the square root of the molecular mass.

Question 5

If a beam of positive ions is injected at right angles into a magnetic field what path do they follow?

Answer 5

They follow a circular path.

Question 6

for a graph showing force against separation what is true?

Answer 6

1. r < @ there is an infinite repulsion.
2. The attractive force has a short range.

Question 7

define mole?

Answer 7

amount of a substance which contains as many basic entries

Question 8

Avogadro constant

Answer 8

6.022 x 10^23

Question 9

define molar mass?

Answer 9

mass of one mol

Question 10

formula for molar volume:

Answer 10

molar volume = molar mass / density

Question 11

define unified atomic mass unit:

Answer 11

is 1/12 th of the mass of a isolated carbon 1 atom

Question 12

at constant temperature:

(investigating relationship between pressure, temperature and volume)

Answer 12

p directly proportional to 1 over V

Question 13

at constant pressure:

Answer 13

V directly proportional to T

Question 14

at constant volume:

Answer 14

P directly proportional to temperature.

Question 15

equation for an ideal Gas:

Answer 15

pV = nRT
pressure, volume, no. of moles, molar gas constant, temprature

Question 16

Molar Gas Constant R

Answer 16

8.31 J mol K

Question 17

Define ideal gas.

Answer 17

gas which strictly obeys pv=nrt

Question 18

equation for molar mass?

Answer 18

Molar mass = Mass / Moles

Question 19

convert from kelvin to celsius :

Answer 19

-273.15

Question 20

What is the kinetic energy link with temperature for molecule.

Answer 20

greater the temperature is the more kinetic energy is in the molecules.

Question 21

define elastic collisions.

Answer 21

no loss in kinetic energy.

Question 22

First assumption of molecules:

Answer 22

volumes of the molecules is a negligible fraction of the volume occupied by the gas.

Question 23

Second assumption of molecules:

Answer 23

molecules exert negligible forces on one another except during collisions.

Question 24

Third assumption of molecules:

Answer 24

effect of gravity is negligible

Question 25

bar ratio with pascal

Answer 25

1 bar = 10^5 Pascals

Question 26

bar ratio with atmosphere

Answer 26

1 atm = 1.01325 bar

Question 27

formula that links mean velocity and pressure.

Answer 27

pV = 1/3 Nmc^2 pressure Volume mean velocity mass Number of molecules

Question 28

difference between mean speed and mean velocity.

Answer 28

with speed direction is not significant.

Question 29

root mean square speed :

Answer 29

Crms = root(mean square speed)

Question 30

mean kinetic energy:

Answer 30

E = 1/2 mc^2 (Crms)

Question 31

another formula for kinetic energy:

Answer 31

E = 3/2 p V

Question 32

Mean K.E per molecule:

Answer 32

3/2 K T

Question 33

we can write kinetic energy with temperature.

Answer 33

E = 3/2 n RT

Question 34

define molar heat capacity?

Answer 34

heat required to raise the temperature of 1 mol of the gas by 1 K without changing the volume.

Question 35

Boltzmann constant (K)

Answer 35

1.38 x 10^-23 JK

Question 36

ideal gas assumes?

Answer 36

1. no forces between molecules except during collisions. 2. energy of a gas is kinetic and dependant only on temperature.

Question 37

equation for ideal gas for two systems?

Answer 37

pv/t = pv/t

Question 38

assumptions for kinetic theory of a gas.

Answer 38

1. molecules of a particular gas are the same. 2. collisions between molecules and the side of the box are perfectly elastic. 3. no force on molecule except during collisions. 4. molecules motion is random