Chap 10: Gases

Question 1

Used to measure atmospheric pressure and used to measure pressure of gases

Answer 1

• Barometer

- Mercury manometer

Question 2

Dalton’s law

Answer 2

the pressure exerted by a mixture of gases is equal to the sum of the partial pressures of all component the gases

Question 3

Deviations from ideal gas behavior

Answer 3

• Significant deviations occur at high pressures and low temp
• while min deviations occur when we have lowe pressure and high temp

Question 4

Kinetic Molecular Theory and it’s properties

Answer 4

The average kinetic energy of the gas particles is directly proportional to absolute temperature (in K).

The collision is overall elastic that means that there’s transfer of energy but no loss of energy.

Any KE lost by one particle is completely gained by the other.

Not all particle are moving at the same speed, instead, there’s a distribution of speed.

Moles exert no forces on each other (no intermolecular or repulsive attractions), except during collisions.

Question 5

Maxwell-Boltzman speed distribution

Answer 5

• At low temp molecules have narrow distribution and lower speeds
• at high temps, moles have broader distribution and higher speeds.

Question 6

Mean Free Path and formula and it’s correlation with pressure.

Answer 6

The average distance molecules travel before collision.

As pressure increases, it decreases.

Mean Free Path = Av speed * Av time btn collision.

Question 7

diffusion and effusion

Answer 7

The rates of effusion and diffusion is related to the root mean square.

Question 8

Enrichment

Answer 8

Escaped gas is enriched with lighter gas molecules

Question 9

Deviations from ideal gas behavior PV/nRT (1) occur

Answer 9

At high pressure and low temperatures. positive (>1) and negative deviation(<1)