Topic 1- Gases

Question 1

pressure definition

Answer 1

the amount of force applied to an area

Question 2

a decrease in volume will _______ the pressure

Answer 2

increase

Question 3

heat and cold will ______ to volume

Answer 3

heat- expand
cold- decrease

Question 4

when we are comparing what do we need to do

Answer 4

do it over 1/2 and isolate

Question 5

density of a gas formula

Answer 5

d= molar mass x pressure/ RT

Question 6

molar mass of a gas

Answer 6

molar mass= mass x RT/ PV

Question 7

pressure from density

Answer 7

-Multiply both sides of the equation by 𝑅×𝑇 to eliminate the denominator

Density x R𝑇=MolarMass×Pressure

-Divide both sides by
MolarMass to isolate
𝑃=Density×𝑅×𝑇/MolarMass

​

Question 8

total pressure is

Answer 8

the some of all partial pressures

Question 9

mole fraction

Answer 9

moles of compound A/ total moles

Question 10

partial pressure

Answer 10

mole fraction x total pressure

Question 11

to go from L to mol to G what is the first step

Answer 11

use PV=nRT and rearrange formula

Question 12

U rms definition

Answer 12

speed at which a molecule whose kinetic energy is equal to the mean kinetic energy of all molecules

Question 13

urms formula

Answer 13

square root of 3 x RT/ molar mass

-RT is 8.314
-molar mass is in kg

Question 14

vanderwals equation of a and b meaning

Answer 14

a- measure of attraction strength
b- measure of the finite volume occupied by molecules