LEC 12

Question 1

The Combined Gas Law

Answer 1

All of three laws (Charles, Boyle, Gay-Lussac) combined into one called the Combined Gas Law

Question 2

The Combined Gas Law Formula

Answer 2

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

Question 3

What properties of gases does Avogadro’s Law consider?

Answer 3

Volume and Moles

Question 4

Avogadro’s Law Formula

Answer 4

V1/n1 = V2/n2

Question 5

Avogadro’s Law

Answer 5

the volume of a gas is directly related to the number of moles of a gas when temperature and pressure stay the same.

Question 6

STP full form

Answer 6

Standard Temperature & Pressure

Question 7

Standard Temperature & Pressure

Answer 7

conditions used to make comparisons between different gases

Question 8

STP Conditions (2)

Answer 8

Temperature: exactly 273 K (0°C)
Pressure: exactly 1 atm (760 mmHg)

Question 9

1 mole of gas =
______ (STP)

Answer 9

22.4 L (STP)

Question 10

molar volume

Answer 10

1 mole of gas = 22.4 L (STP)

Question 11

Dalton’s Law of Partial Pressures

Answer 11

The total pressure of a gas mixture is the sum of the partial pressures of the gases in the mixture.

Question 12

Dalton’s Law of Partial Pressures Formula

Answer 12

P total = P1 + P2 +
P3 + …

Question 13

Air we breathe is made up of is (3)

Answer 13

21% oxygen
78% nitrogen
1% other gases

Question 14

Gas behaviour in mixtures (3)

Answer 14

• Particles all behave the same way
• Total pressure of the gases is a result of all gas particle collisions
• Each gas exerts its own pressure = partial pressure