Chapter 5

Question 1

There is a lot of ______ space in a gas.

Answer 1

Free

Question 2

Gases can _________ infinitely.

Answer 2

Expand

Question 3

Gases occupy containers ___________ and ___________.

Answer 3

Uniformly

Completely

Question 4

In gas properties V means what?

Answer 4

Volume of the gas (L)

Question 5

In gas properties T means what?

Answer 5

Temperature (K)

Question 6

In gas properties n means what?

Answer 6

Amount (moles)

Question 7

In gas properties p means what?

Answer 7

Pressure (atmospheres)

Question 8

Pressure of air is measured with a what?

Answer 8

Barometer

Question 9

1 standard atmosphere equals _______ mmHg (torr).

Answer 9

760

Question 10

SI unit for pressure is Pascal (Pa) where 1 atm = __________ KPa

Answer 10

101.325

Question 11

The ideal gas law formula is what?

Answer 11

PV=nRT

Question 12

R is a gas constant in PV=nRT which equals what?

Answer 12

R= 0.082057 per L atm/K mol

Question 13

Boyle’s Law states that if n and T are constant then what?

Answer 13

PV=(nRT)=K

PV=K

Question 14

Boyle’s Law also states that P=_____ or V=______.

Answer 14

P=k(1/V)

V=k(1/P)

Question 15

As volume increases, pressure ___________.

Answer 15

Decreases

Question 16

As pressure increases, volume ____________.

Answer 16

Decreases

Question 17

At constant n (moles) and T (Kelvin) pressure and volume are ____________ proportional.

Answer 17

Inversely

Question 18

What is the formula when pressure and volume are at a constant temp?

Answer 18

(P1)(V1)=(P2)(V2)

Question 19

Charles Law states if n (moles) and p (pressure atm) are constant then V=(nR/P)T=kT therefore V=_________.

Answer 19

V=kT

Question 20

According to Charles law when volume increases, temperature ____________.

Answer 20

Increases

Question 21

According to Charles law when the temperature decreases the volume ___________.

Answer 21

Decreases

Question 22

Charles law also states that V/T=____.

Answer 22

V/T=k

Question 23

Volume and temperature are ____________ proportional at constant n (moles) p (pressure atm).

Answer 23

Directly

Question 24

What is the formula when volume and temperature are directly proportional?

Answer 24

V1/T1=V2/T2

Question 25

Temperature is always expressed in _________ when working with gases.

Answer 25

Kelvins

Question 26

The combined gas law is when you combine ________ and ________ Law when n is constant.

Answer 26

Boyle’s Charles

Question 27

The combined gas law formula when n is constant is what?

Answer 27

(P1)(V1)/T1=(P2)(V2)/T2

Question 28

Avogadro’s Law states that equal volumes of gases at the same T and P have the same number of ____________.

Answer 28

Molecules

Question 29

Avogadros Law states that V=n(RT/P)=kn so this must mean that ________.

Answer 29

V=kn

Question 30

In Avogadros Law V (volume) and n (moles) are _________ related. When moles increase, the volume increases at a constant T and P.

Answer 30

Directly

Question 31

The molar gas volume (Vm) is the volume 1 mole of gas occupies and is ____________.

Answer 31

22.4L/1 mol

Question 32

What equation is used to calculate the molar mass of an unknown gas at known density, temp and pressure?

Answer 32

Mm=(d)(R)(T)/P

Question 33

Dalton’s law of partial pressures states that P total in gas mixture=_____________.

Answer 33

P total in gas mixture=PA+PB+PC etc.

Question 34

Dalton’s law states that the total pressure is the sum of all the __________ pressures.

Answer 34

Partial

Question 35

The partial pressure of A in A+B+C mixture is _________ proportional to the number of moles of A.

Answer 35

Directly

Question 36

The kinetic molecular theory (KMT) is a theory used the explain the ______ laws.

Answer 36

Gas

Question 37

The kinetic molecular theory assumes gases consist of molecules in ________, random motion.

Answer 37

Constant

Question 38

The kinetic molecular theory assumes pressure arises from __________ with container walls.

Answer 38

Collisions

Question 39

The kinetic molecular theory assumes there are no attractive or repulsive forces between molecules. Collisions are __________.

Answer 39

Elastic

Question 40

The kinetic molecular theory assumes the volume of molecules in a gas is ___________.

Answer 40

Negligible

Question 41

Because we assume gas molecules are in motion they have ___________ energy. (KE)

Answer 41

Kinetic

Question 42

At the same temperature all gases have the same average ___________ energy.

Answer 42

Kinetic energy

Question 43

As temperature goes up, kinetic energy also increases and so does ________.

Answer 43

Speed

Question 44

Increasing the number of molecules (or moles) at a constant temp and pressure, pressure also proportionally ___________.

Answer 44

Increases

Question 45

Increasing the number of molecules, proportionally increases the pressure because?

Answer 45

More collisions occurring per second

Question 46

Increasing temperature, increases pressure because the average _________ energy increases causing more collisions per second.

Answer 46

Kinetic

Question 47

Increasing temperature, increases pressure because the average collision _________ increases along with the average kinetic energy.

Answer 47

Force

Question 48

Decreasing volume at constant moles and temp increases __________ because there are more collisions per second.

Answer 48

Pressure

Question 49

Molecules of a given gas at a specific temperature have a ________ of speeds.

Answer 49

Range

Question 50

The molar mass of a gas effects the _____________ of speeds.

Answer 50

Distribution

Question 51

The distribution of speeds is expressed by maxwells equation that reads: ____________.

Answer 51

Urms=square root 3(R)(T)/Mm

Question 52

Speed increases with ____________.

Answer 52

Temperature

Question 53

Speed decreases with ___________ ________.

Answer 53

Molar mass

Question 54

In maxwells equation R is expressed in SI units=___________.

Answer 54

8.314510 J/k•mol

Question 55

In maxwells equation the Mm (molar mass) is in units of what?

Answer 55

Kg/mol

Question 56

Graham’s Law governs __________ and __________ of gas molecules.

Answer 56

Effusion and diffusion

Question 57

Graham’s Law equation is Rate for A/Rate for B=____________.

Answer 57

Rate for A/Rate for B=square root of Mm of B/Mm of A

Question 58

The rate of effusion is inversely proportional to its ___________ _______.

Answer 58

Molar mass

Question 59

In gas diffusion lighter compounds travel __________.

Answer 59

Faster

Question 60

We can account for volume of molecules and intermolecular forces with what?

Answer 60

Van Der Waal’s equation

Question 61

What is van der waal’s equation?

Answer 61

[P+a(n^2/V^2)](V-bn)=nRT