CHM 2045C  Module Six Sample Exam Part D Answers

Module 5 SamplePretest

Module Six Part D Gas Laws                                         5 points

State:

Boyle’s Law (In words) Section 12.2 p 550-552

The volume of a gas is inversely proportional to the pressure when the temperature remains constant.

V1P1=V2P2

Charles Law (in words)     Section 12.2 p 552-3

The volume of a gas is directly proportional to the Kelvin temperature if the pressure remains constant.

V1  =  V2

T1      T2

Dalton’s Law of Partial pressures (in words)  Section 12.5 p564-566

The total pressure of a gaseous mixture is equal to the sum of the individual pressure of each gas.

Ptotal =  P1  + P2  + P3 + …

Combined Gas Law Equation (write only the equation): Section 12.3  p 554-555

V1P1   =   V2P2

T1           T2

Ideal Gas Equation (write only the equation): Section 12.3  p 557-558

PV = nRT

Graham’s Law of Effusion: Section 12.7   p571-573

The rate of effusion of a gas is inversely proportional to the square root of its molecular mass.

Rate of effusion of gas 1           ( molar mass of gas 2 ) ½

----------------------------------    =       ----------------------------

Rate of effusion of gas 2            ( molar mass of gas 1 ) ½

Avogadro’s Hypothesis: Section 12.1   p 556-557

Equal volumes of gases under the same conditions of temperature and pressure have equal numbers of particles.

or

(The volume of a gas at a given temperature and pressure is directly proportional to the amount of gas in moles:

V  proportional  n at constant T and P )