Gas Laws

Question 1

Properties of Gases

Answer 1

Compressible
Expandable
Occupy containers
Exert pressure

Question 2

Ideal Gas Law

Answer 2

PV=nRT
P:atm, V:L, n:mol, R:constant, T:K

Question 3

Density

Answer 3

D=PM/RT
d:g/L, P:atm, M:g/mol, R:constant, T:K

Question 4

Gases of a (higher or lower) density will (sink or rise)

Answer 4

Higher->sink
Lower->rise

Question 5

How to determine increasing density

Answer 5

The higher the molar mass, the more dense
The lower the molar mass, the less dense

Question 6

Boyles Law (Pressure & Volume)

Answer 6

P1V1=P2V2

Question 7

Charles Law (Volume & Temperature)

Answer 7

V1/T1=V2/T2
T must be in Kelvin

Question 8

Amontons Law (Pressure & Temperature)

Answer 8

P1/T1=P2/T2
T must be in Kelvin

Question 9

Combined Gas Law (Pressure, Temperature & Volume)

Answer 9

P1V1/T1=P2V2/T2
T must be in kelvin

Question 10

Daltons Law of Partial Pressures

Answer 10

Ptotal = Pa+Pb+Pc+…
Ptotal=(nA+nB+nC)(RT/V)

Question 11

Mole Fraction X w/ Partial Pressures

Answer 11

Xa=nA/ntotal
Pa=Xa*Ptotal

Question 12

All molecules in a gas sample at a given temperature have the ___ average kinetic energy

Answer 12

Same

Question 13

Average Kinetic Energy

Answer 13

KE=3/2RT

Question 14

Average speed of a molecule is ___ proportional to its molecular weight

Answer 14

Inversely

Question 15

Average speed of a molecule is ___ proportional to the temperature

Answer 15

Directly

Question 16

When is a gas most likely to deviate from ideal behavior

Answer 16

Low temperature
High pressure
Higher molar mass