Gases

Question 1

Gas molecules have no definite ___ or ___, are widely ___ and can be easily ____. They are in ___, constant motion

Answer 1

size, shape, separated, compressed, random

Question 2

Atoms which exist in pairs due to unstable nature, and high reaction as a single atom

Answer 2

diatomic gases

Question 3

Temperature is the measure of __ __ or movement of gas particles. Movement increase the ____ and, thus when collisions occurs, there is more energy or ___ transfer.

Answer 3

kinetic movement, velocity, heat

Question 4

Gases do not have distinct ___, instead they take up the shape of the container.

Answer 4

volume

Question 5

pressure is the ___ of the gas particles colliding with the __ of the container. An increase in _____ results in a decrease in pressure

Answer 5

force, colliding, area

Question 6

When gas is confined to a container, an external force can compress that gas, and the volume ____. This results in more ____, and thus more ____.

Answer 6

decrease, collision, pressure

Question 7

When the gas is expanded, the volume is ___, __ collisions, and __ pressure

Answer 7

increased, decreased, decreased

Question 8

Expansion and compression of gasses is easy because there is a lot of ___ between the particles

Answer 8

space

Question 9

Boyle’s law is given by the equation _____. It says that the pressure and volume are ___ ___ under constant temperature and ___.

Answer 9

P1V1=P2V2, inversely proportional, moles

Question 10

Charles law is given by the equation ____. It says that the __- and ___ are directly proportional under constant pressure and moles

Answer 10

V1/T1=V2/T2, volume temperature

Question 11

Avogadro’s law is given by _____. It says that __ and ___ are directly proportional under constant __ and pressure

Answer 11

V1/n1=V2/N2, volume, moles, temperature

Question 12

Gay-Lussac’s law is given by ______. It says that pressure and ___ are directly proportional under constant __ and ___

Answer 12

Pi/T1=P2/T2, temperature, volume, moles

Question 13

The combined gas law is given by

Answer 13

PiV1/T2n1 = P2V2/n2T2

Question 14

An ideal gas behaves in __, __ and ___ motion, according to the kinetic molecular theory of gases

Answer 14

constant, random, straight-line

Question 15

The kinetic molecular theory gasses states that particles in a gas are in constant, ____ motion, the combined __ of the particles is negligible, the particles exert no ___ on one another, the gas molecule collisions are completely ___, meaning there are no ___ ___ between the gases, and all gases have the same __ ___ __ at a given temperature.

Answer 15

random, volume, forces, elastic, intermolecular forces, average kinetic energy

Question 16

At ___K the volume of a gas is 0

Answer 16

0

Question 17

Gases behave most ideally at __ __, because the gases are far apart, meaning there are less _____ ___, and interactions. It also behaves most ideally at __ ___, as the gas are __ __ and thus there is an decrease in intermolecular forces

Answer 17

low pressure, intermolecular forces, high temperature, moving faster

Question 18

The ideal gas law is given by

Answer 18

PV=nRT

Question 19

Standard temperature is ____ and pressure is _____ for an ideal gas. 1 mole of a gas at STP is ___L

Answer 19

273, 1 atm, 22.4

Question 20

In a mixture of gasses, the pressure created by one molecule is ___ of one another

Answer 20

independent

Question 21

Dalton’s law of partial pressure says that the total pressure of the mixture is equal to the sum of the __ __ of individual gases. The partial pressure of one gas is given by the ____

Answer 21

partial pressures, moles of gas 1/total moles x total pressure

Question 22

The mass of a gas occupying a certain volume

Answer 22

gas density

Question 23

The gas density is given by _______

Answer 23

PMw/RT

Question 24

when molecules move from high to low concentration

Answer 24

diffusion

Question 25

When a confined gas escapes through a small hole

Answer 25

effusion (r)

Question 26

The effusion rate is highest for ____, and lowest for ____. The gas with the __ ____ __ effuses faster

Answer 26

gasses, solids, lower molecular weight

Question 27

Graham’s law of effusion says the rate of the effusion of a gas is __ ___ to the square root of its ___ ____. This is why __ gasses tend to diffuse much more rapidly than heavier ones. The law is given by the equation ____

Answer 27

inversely proportional, molar mass, lighter, r1/r2 = (Mw2/Mw1)^(-1/2)