Gas Chem

Question 1

What are the most important properties for gas?

Answer 1

Pressure, volume, temperature

Question 2

Kinetic molecular theory is based on

Answer 2

Gas take up almost no space, gas is in constant motion moving in straight lines at constant speeds, gas experience no intermolecular forces, gas kinetic energy is proportional to temp

Question 3

What type of collision happen between gas molecules?

Answer 3

Elastic

Question 4

What is an ideal gas?

Answer 4

One that meets the kinetic molecular theory requirements

Question 5

If amount of gas and pressure remains the same, what is volume proportional to?

Answer 5

Volume is proportional to temperature

Question 6

Charles law

Answer 6

If pressure is constant then a gas will expand when heated and contract when cooled

Question 7

If the temperature is constant, what is the relationship between pressure and volume?

Answer 7

Pressure and volume are inversely proportional

Question 8

Boyles law

Answer 8

If volume decreases less space is available so gas hits walls and pressure increases

Question 9

If volume is constant what is the relationship between pressure and temperature?

Answer 9

Pressure and temperature are directly proportional

Question 10

What is standard molar volume?

Answer 10

Volume that one mole of gas occupies at zero degrees Celsius and 1 atm

Question 11

If there are deviations to ideal gas law when does this usually happen?

Answer 11

High pressure and low temp. Gas particles may have volume

Question 12

At high pressures and low temp what happens?

Answer 12

Intermolecular forces form and less momentum is transferred

Question 13

What is the exception to the ideal gas law dealing with volume?

Answer 13

Individual gas particles have volume and at high pressures must be accounted for. This decreases volume. Van dear Waals equation is used

Question 14

Dalton’s law of partial pressure

Answer 14

Total pressure equals sum of partial pressures

Question 15

Mole fraction

Answer 15

Number of molecule over total molecules

Question 16

Graham’s law of effusion

Answer 16

If gas have diff molar masses heavier molecules will move slower than lighter ones. RMS tells how much faster lighter gas will move

Question 17

Do molecules of two diff gases that have same temp have the same kinetic energy?

Answer 17

Yes

Question 18

Doe molecules of two diff gases that are at the same temp have the same speed?

Answer 18

No. Graham’s law of effusion. Lighter molecules faster