Gas Pressure

Question 0

1 standard atmospheres (atm) = (mm Hg & bar)

Answer 0

760mm Hg = 101.3 kPa & 1.01325 bar

Question 1

Pressure

Answer 1

The force exerted on an object divided by the area over which it is exerted. Barometer measures pressure. Unit in millimeters of mercury.

Question 2

SI unit of pressure is the _______

Answer 2

pascal (Pa)

Question 3

1 pascal (Pa) =

Answer 3

1 newton/meter²

Question 4

1 bar = (Pa & atm)

Answer 4

100,000 Pa 0.9872 atm

Question 5

Boyle’s law

Answer 5

Expresses that the product of the pressure and volume of a gas sample is a constant at a given temperature. P₁V₁ = P₂V₂ at constant n and T

Question 6

Avogadro’s Hypothesis

Answer 6

Equal volumes of gases under the same condition of temperature and pressure have equal number of particles. V ⇒n at constant T and P

Question 7

The Ideal Gas Law

Answer 7

PV=nRT

Question 8

Standard temperature and pressure (STP)

Answer 8

Gas temp of 0º or 273.15K Pressure of 1 atm

Question 9

Standard molar volume

Answer 9

1 mol of an ideal gas occupies 22.414 L

Question 10

Gas constant R

Answer 10

0.082057 L•atm/ K•mol

Question 11

Density of Gas

Answer 11

d = m/V = P•M/R•T

Question 12

Dalton’s law of partial pressures

Answer 12

Ptotal = P1 + P2 + P3 . . .

Question 13

General Gass Law

Answer 13

P₁ V₁/T₁ = P₂V₂/T2

Temp in K (Cº +273)

Question 14

Normal Boiling point

Answer 14

The temperature at which the vapor pressure of a liquid equals 1 atm

Question 15

Rate of effusion of Gas 1/

rate of effucion of gas 2 =

Answer 15

Sq Root ( molar mass gas 2/ molar mass gas 1)

Question 16

Properties of Water that are contributed to hydrogen bonding

Answer 16

High melting point

high heat of vaporization

low vapor pressure

high suface tention

Question 17

Hydrogen bonding, X—H . . . :Y

Answer 17

Very polar X—H bond and atom Y with lone pair of electrons (where X and Y = F, N, O). Typical energy =
20 kJ/mol.