Ideal Gases (Jones)

Question 1

Why do gases exert a pressure

Answer 1

Gas particles collide with an object
Each collision enters a force as pressure why Gas= force/area
If there is a total force exerted on an area there must be a pressure Elastic collision

Question 2

What is an elastic collision

Answer 2

A collision does not lose energy or waste it

Question 3

What is newtons real second law

Answer 3

Resultant force applied is directly proportional to the rate of change of momentum

Question 4

Resultant force equation

Answer 4

F=change in momentum/ time(for collisions)

Question 5

What is avogodra number

Answer 5

6.02x10^23 = 1 mole

Question 6

What is a mole

Answer 6

Number of atoms that are in 12g or o.o12 kg of carbon 12

Question 7

What is molar mass

Answer 7

Mass of 1 mole of particles

Question 8

What is N equal to

Answer 8

Number of atoms present

Question 9

What is n equal to

Answer 9

Number of moles

Question 10

What is the equation linking N,n,Na

Answer 10

N = n x Na

Question 11

What is the equation for mass of 1 atom

Answer 11

m/N

Question 12

What does m/N correlate to

Answer 12

Mass of 1 atom

Question 13

What is molar mass

Answer 13

m/n

Question 14

What does m/n correlate to

Answer 14

Molar mass

Question 15

What is boyles law

Answer 15

Pressure of a gas is inversely proportional to its volume

Question 16

What conditions must be met for Boyle law to be true

Answer 16

As long a temperature remains constant
The mass of the gas is constant (the number of moles or the number of molecules of gas is constant)

Question 17

What equation with pressure and volume gives you a constant

Answer 17

PV = constant (pacm^3)
P = pressure (Pa)
V= volume (cm^3)

Question 18

What is Charles law

Answer 18

Volume is directly proportional to temperature(on absolute scale)

Question 19

What conditions must be met for Charles law to be true

Answer 19

A constant pressure and mass of gas

Question 20

How do you find a constant for Charles law

Answer 20

V/T = constant

Question 21

What is the pressure law

Answer 21

Pressure is directly proportional to temperature

Question 22

What must conditions must be met for the pressure law to be true

Answer 22

As long as volume of gas
A fixed mass of volume

Question 23

How do you find the constant for the pressure law

Answer 23

P/T = constant

Question 24

What does T mean

Answer 24

Temperature is measured in kelvin instead of degrees Celsius

Question 25

What are the assumptions of ideal gases

Answer 25

The gas contains a very large number of atoms or molecules moving in random directions The atom or molecules of gas occupy negligible volume compared with the volume of gas Collisions are perfectly elastic Time of collisions between the atoms or molecules is negligible compared to the time between the collisions Forces between atoms are negligible except between collisions

Question 26

What is the ideal gas equation(moles)

Answer 26

PV = nRT P = pressure (pa) V = volume (cm^3) N = number of moles (mol) T = temperature (K) R = molar mass gas constant

Question 27

What is the molar mass constant

Answer 27

8.31 JmolK^-1

Question 28

What is the ideal gas equation for molecules

Answer 28

3 moles = 3 x Na molecules n moles = n x Na molecules N = number of molecules = n x Na PV = NKT K = bolt man constant

Question 29

What is the boltments constant

Answer 29

1.38 x 10^-23

Question 30

What equation links the ideal gases equation for molecules and the ideal gas equations for moles

Answer 30

PV = nRT PV = NKT NKT = nRT NK = nR N = Na x n KNan=nR R= NaK K= R/Na