3.1.2.3 the ideal gas equation

gases also react in ______ amounts, but its much more convenient to consider the ______ of a gas than its mass

• molar

• volume

give the ideal gas equation

pV = nRT

pressure x volume = moles x gas constant x temp

gives the units of the ideal gas equation

how do you convert between:

a. KPa + Pa

b. dm³ + m³

c. cm³ + m³

d. ℃ + K

what is the ideal gas? give 4 features

the ideal gas:

• is made of identical particles in continuous random motion

• the particles have position but zero volume

• collisions between particles are completely elastic ie no energy is lost

• there are no forces acting between the molecules

the gas constant is 8.31

1. make a list of what values you have + what is the unknown

2. convert units if needed

3. rearrange ideal gas equation

4. substitute values

answer = 0.020 mol

the volume of a gas depends on what? + this means what?

• on the temperature, pressure + number of moles

• this means that under the same conditions of temperature + pressure, the volume of gas will only be affected by the change in moles