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Flashcards in Gas Chem Deck (18):
1

What are the most important properties for gas?

Pressure, volume, temperature

2

Kinetic molecular theory is based on

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

3

What type of collision happen between gas molecules?

Elastic

4

What is an ideal gas?

One that meets the kinetic molecular theory requirements

5

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

Volume is proportional to temperature

6

Charles law

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

7

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

Pressure and volume are inversely proportional

8

Boyles law

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

9

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

Pressure and temperature are directly proportional

10

What is standard molar volume?

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

11

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

High pressure and low temp. Gas particles may have volume

12

At high pressures and low temp what happens?

Intermolecular forces form and less momentum is transferred

13

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

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

14

Dalton's law of partial pressure

Total pressure equals sum of partial pressures

15

Mole fraction

Number of molecule over total molecules

16

Graham's law of effusion

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

17

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

Yes

18

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

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