2. Gases

Question 1

what is a gas

Answer 1

loose connection of weakly attracted atoms/molecules that move in random direction

Question 2

what is density of gases relative liquids

Answer 2

less dense than liquids

Question 3

what is standard temperature and pressure

Answer 3

0 degree Celsius

1atm

Question 4

are the following miscible with other its state

gases
liquids

Answer 4

all gases are miscible with each other

liquids are not

Question 5

in the kinetic molecular theory what is assumed about gases in terms of collision

Answer 5

gas molecules make completely elastic collisions

Question 6

in the kinetic molecular theory what is assumed about gases in terms of volume

Answer 6

gas molecules have 0 volume

Question 7

in the kinetic molecular theory what is assumed about gases in terms of the relationship between avg kinetic energy and temp

Answer 7

avg kinetic energy of gas molecules is directly proportional to temperature of the gas

Question 8

in the kinetic molecular theory what is assumed about gases in terms of forces

Answer 8

gas molecules will only exhibit forces due to collisions

Question 9

what is the equation for the ideal gas law

Answer 9

PV = nRT

P = pressure (atm)
V = volume (L)
n = # moles of gas
R = universal/ideal gas constant
T = temperature (Kelvin)

Question 10

what is charles law

Answer 10

volume of gas is directly proportional to temperature when pressure and amount of gas is kept constant

Question 11

what is the equation for charles law

Answer 11

V1/T1 = V2/T2

Question 12

what is boyles law

Answer 12

when the volume of ideal gas is kept at a fixed temp the pressure and volume are inversely proprtional

Question 13

what is the equation for boyles law

Answer 13

P1V1 = P2V2

Question 14

according to boyles law what happens to pressure as volume increases

Answer 14

decreases

Question 15

the ideal gas law is the same for all ideal gases so what does this mean for the other factors in the ideal gas equation if all gases have same volume

Answer 15

all gases have same volume if they have same # of molecules, temp and pressure

Question 16

what is partial pressure

Answer 16

the amount of pressure contributed by any gas in a mixture

Question 17

what is the partial pressure equation for a particular gas

Answer 17

P(B) = XB x P(total)

P(B) = partial pressure of gas B
XB = mole fraction of gas B
P(total) = total gaseous pressure

Question 18

what is daltons law

Answer 18

total pressure exerted by a gaseous mixture is the sum of the partial pressures of each of its component gases

Question 19

what is the daltons law equation

Answer 19

P(total) = P1 + P2 + P3…

Question 20

what are 2 types of gaseous spreading

Answer 20

effusion and diffusion

Question 21

what is diffusion

Answer 21

spreading of one gas into another gas or into an empty area

Question 22

what is effusion

Answer 22

spreading of a gas from a high pressure to a very low pressure via an opening that is smaller than the average distance between the gas molecules

gas moves through this very small opening into a vacuum