Ideal Gas Law and Partial Pressure

Question 1

What is the ideal gas law?

Answer 1

PV = nRT

Question 2

What is the gas constant (R)?

Answer 2

0.0821 (atm)(L)/(mol)(K)
8.314 J/(mol)(K)

Question 3

What is standard temperature and pressure (STP)?

Answer 3

Pressure of 1 atm and temperature of 273.15 K (0 C)

Question 4

At STP, what is the volume of 1 mol of gas?

Answer 4

22.4 L

Question 5

What is partial pressure?

Answer 5

The pressure exerted by each individual gas in a mixture of gases

Question 6

What does Dalton’s Law of partial pressures say?

Answer 6

The total pressure in a gas mixture equals the sum of the partial pressures of each gas

Question 7

How do you find gas density using pressure, molar mass, the gas constant (R), and temperature?

Answer 7

D = (P)(MM)/RT

Question 8

How do you find gas density at STP?

Answer 8

(Molar Mass)/(22.4 L)
22.4 L = standard molar volume

Question 9

How do you find the partial pressure of a gas from its mole fraction and total pressure?

Answer 9

Multiply the mole fraction by the total pressure.