Unit 3 Gases

Question 1

what is the equation for pressure?

Answer 1

P=force/area

Question 2

properties of macroscopic level

Answer 2

TVnP
temperature, volume, moles, pressure

Question 3

what are the five rules of the kinetic molecular theory?

RCIEK

Answer 3

1. gases made of tiny particle move at random
2. total number of particles is very small compared to the size of the containers its in
3. particles do not interact with each other
4. particle collision are elastic so no energy is lost
5. kinetic energy increase with temperature

Question 4

the formula for average kinetic energy? value of R? units for R)

Answer 4

K.E=3/2RT

R=8.3145(J/molK)

Question 5

what is formula to find kinetic energy in terms of mass and speed?

Answer 5

K.E=1/2mv^2

Question 6

what is formula to find kinetic energy in terms of mass and average speed?

Answer 6

K>E=1/2mu^2

Question 7

What does pressure result from?

Answer 7

results from gas particles colliding with container walls

Question 8

Boyles law equation? relationship?

Answer 8

P{1}V{1}=P{2}V{2}

pressure of gas inversely proportional to volume

Question 9

Charles law? what is the relationship?

Answer 9

V1/t1-V2/t2

volume proportional to temperature

Question 10

avagadros law? relationship?

Answer 10

V1/n1=V2/n2

Question 11

ideal gas equation and value of R

Answer 11

PV=NRT

R=0.08206 J/mol(K)

Question 12

partial pressure law

Answer 12

total pressure is equal to the sum of all partial pressure

calculate partial pressure using the ideal gas equation

Question 13

how to calculate the partial pressure given the moles of three molecules and a torr number

Answer 13

1. take the mole fraction of each element so the number of moles of one of the elements divided by the total moles
2. multiply the answer of each mole fraction by the pressure to get the partial pressure of each element

Question 14

effusion

Answer 14

the escape of gas through a hole in a vacuum

Question 15

diffusion

Answer 15

the movement of gas through another

Question 16

what happens to diffusion and effusion when speed goes up

Answer 16

there rates increase

Question 17

how is the fact that mass and speed are inversely proportional shown (mass of red and black particles vs the speed of red and black particles)

Answer 17

(m red/mblack)^1/2=ublack/ured

Question 18

How to convert from torr to atm

Answer 18

Divide by 760 torr

Question 19

How many kPa are in one atm

Answer 19

101.325

Question 20

where are gases found? AEB

Answer 20

atmosphere of Earth and other planets

engineering

biological systems

Question 21

what are the properties of the molecular level?

Answer 21

structure dynamics of intermolecular forces

Question 22

what is kinetic energy proportional to?

Answer 22

temperature

Question 23

what are the sizes of molecules inversely proportional to?

Answer 23

temperature

Question 24

is the pressure of gas greater than or less than atmospheric pressure?

Answer 24

less than