Gases

Question 1

Gases are compressible because gas particles are _____________ compared to the size of their container.

Answer 1

Small

Question 2

Gas pressure is caused by gas particles hitting the walls of the container. Pressure is dependent on two things:

Answer 2

1) how hard they hit the walls (speed/energy)
2) how many are hitting the walls (speed/more particles)

Question 3

P and V are __________ proportional at constant temperature.

Answer 3

Indirectly

Question 4

T and P are __________ proportional when volume is constant.

Answer 4

Directly

Question 5

P and n are ___________ proportional when volume and temperature are constant.

Answer 5

Directly

Question 6

How to select a gas constant, R, in PV = nRT.

Answer 6

Based on units of pressure

Question 7

STP

Answer 7

1 atm
273 K

Question 8

Moles/volume relationship of gas at STP

Answer 8

1 mol takes up 22.4 L

Question 9

Molar mass formula for gases

Answer 9

MM = DRT/P

Question 10

Gases at the same temperature have the same ________________.

Answer 10

Average kinetic energy

Question 11

Gases with larger molar masses have __________ average speeds.

Answer 11

Lower

Question 12

Formula to use when bubble gases through water

Answer 12

P_total = P_{dry gas} + P_{water vapor}

Question 13

Conditions for gases to behave most ideally

Answer 13

High T
Low P

Question 14

More ________ gases and ________ gases tend to deviate from ideal behavior.

Answer 14

Polar; larger

Question 15

_______________ gases are most ideal.

Answer 15

Small, nonpolar