Chapter 8: Gas phase

Question 1

pressure equivalents

Answer 1

1 atm = 760 mmHg = 760 torr = 101.325 kPa

Question 2

what is standard temp and pressure

Answer 2

273 K and 1 atm

Question 3

what is the avogadros principle

Answer 3

special gas for ideal gas where temp and pressure is constant; shows relationship between moles and volume

Question 4

what is boyles law

Answer 4

temp and moles constant; shows inverse relationship between pressure and volume

Question 5

what is charles law

Answer 5

pressure and moles constants; shows direct relationship between temp and volume

Question 6

what is gay lussacs law

Answer 6

volume and moles constant; show direct relationship between temp and pressure

Question 7

what is the combined gas law

Answer 7

shows inverse relationship between pressure and volume along with direct relationship between pressure and volume with temp

Question 8

what is daltons law of partial pressure

Answer 8

states that individual gas components of a mixture of gases with exert individual pressures in proportion to their mole fractions; total pressure is equal to sum of partial

Question 9

what is henrys law

Answer 9

states that the amount of gas dissolved in solution is directly proportional to partial pressure of that gas at the surface of solution

Question 10

what are the assumptions in kinetic molecular theory

Answer 10

1) gas particles have negligible vol
2) no attraction or repulsion
3) random collisions w each other + walls of container
4) collisions are elastic
5) average kinetic energy is directly proportional to temp

Question 11

what is grahams law

Answer 11

gases with lower molar mass will diffuse/effuse faster than gases with higher molar mass at the same temp

Question 12

how do real gases deviate in terms of volume at high pressure, low volume, and low temp

Answer 12

real gases will occupy LESS volume than predicted because of intermolecular attractions

Question 13

how do real gases deviate in volume extremely high pressure, low volume, and low temp

Answer 13

will occupy more volume than predicted because the particles occupy physical space

Question 14

what is Van der Waals equation of state for

Answer 14

used to correct the ideal gas law for intermolecular attractions and molecular volume

Question 15

equation for ideal gas law

Answer 15

PV = nRT

Question 16

equation for density of a gas

Answer 16

p = m/V = PM/RT

Question 17

equation for combined gas law

Answer 17

P1V1/T1 = P2V2/T2

Question 18

equation for avogadros principle

Answer 18

n1/V1 = n2/V2

Question 19

equation for boyles law

Answer 19

P1V1 = P2V2

Question 20

equation for charles law

Answer 20

V1/T1 = V2/T2

Question 21

equation for Gay Lussac law

Answer 21

P1/T1 = P2/T2

Question 22

Kinetic energy eqaution

Answer 22

KE = 1/2 mV^2 = 3/2KbT
Kb =1.38 x 10^-23 J/K

Question 23

root mean square speed

Answer 23

rms = Square root ( 3RT/M)

Question 24

grahams law equation

Answer 24

r1/r2 = square root (M2/M1)
r = diffusion rates
M = molar mass

Question 25

what is equation for mole fraction (X)

Answer 25

Moles gas A / total moles of gases

Question 26

what is equation for henrys law

Answer 26

[A] = Kh x Pa or Kh = [A1]/P1
Kh = henrys constant

Question 27

what is equation for partial pressure

Answer 27

Pa = X * Ptotal

Question 28

what is the ideal gas constant

Answer 28

0.0821 L*atm/mol * K