Exam 2 Gas Laws and Formulas

Question 1

Boyle’s Law

Answer 1

Volume of gas varies inversely with pressure at constant temperature
P1V1 = P2V2

Question 2

Charles’s Law

Answer 2

Volume of gas is directly proportional to temperature K at constant pressure
V1/T1 = V2/T2

Question 3

Combined Gas Law

Answer 3

Combines Boyle’s and Charles’s Laws - used to find 6th variable when given 5
P1V1/T1 = P2V2/T2

Question 4

Avogadro’s Law

Answer 4

2 gases of equal volumes at the same temperature and pressure have the same number of MOLECULES
V1/molecules1 = V2/molecules2

Question 5

Ideal Gas Law

Answer 5

Combining Boyle’s, Charles’s, and Avogadro’s Laws with proportionality constant R
Used to find 3rd variable when given 2
PV = nRT

Question 6

R

Answer 6

Proportionality constant / molar gas constant
R = 0.082058 Latm / (kmol)

Question 7

STP

Answer 7

Standard Temperature and Pressure
When temperature is at 0 C and pressure at 1 atm

Molar volume of any gas at STP is 22.4 L / mol of gas

Question 8

Molarity

Answer 8

Concentration of a solution
M = moles / L

Question 9

Dilution formula

Answer 9

M1V1 = M2V2