Module 5 - Gases

Question 1

Refers to the Gas Law that is the combination of all simple gas laws.

Answer 1

Ideal Gas Law

Question 2

Which gas law states that the volume of a given amount of gas is inversely proportional to its pressure at constant temperature?

Answer 2

Boyle’s law

Question 3

Which gas law states that the volume of a given amount of gas is directly proportional to its absolute temperature at constant pressure?

Answer 3

Charles’ law

Question 4

Which gas law states that at a fixed volume, the temperature and pressure of a gas are directly proportional to each other?

Answer 4

Gay Lussac’s law

Question 5

Which gas law states that the volume of a gas at a given temperature pressure is directly proportional to the number of moles contained in the volume?

Answer 5

Avogadro’s law

Question 6

The universal value of STP is ___ atm (pressure) and ___°C.

Answer 6

1 atm, 0°C

Question 7

Which law states that the ideal gas law assumes that all gases behave identically and that their behavior is independent of attractive and repulsive forces? And the total pressure exerted by a mixture of gases is the sum of the partial pressures of
component gases.

Answer 7

Dalton’s law

Question 8

It is a theory that is a fundamental concept in chemistry that explains the behavior of matter.

Answer 8

The Kinetic Molecular Theory

Question 9

Assumptions for Kinetic Model of Gases

Answer 9

1. Gases are made up of particles with no defined volume but with a defined mass. In other words, their volume is very small compared to the distance between themselves and other molecules.
2. Gas particles undergo no intermolecular attractions or repulsions. This assumption implies that the particles possess no potential energy; thus, their total energy is equal to their kinetic energies.
3. Gas particles are in continuous, random motion.
4. Collisions between gas particles are completely elastic. In other words, there is no net loss or gain of kinetic energy when particles collide.
5. The average kinetic energy is the same for all gases at a given temperature, regardless of the identity of the gas. This kinetic energy is proportional to the absolute temperature of the gas.

Question 10

What is the Boltzmann’s constant?

Answer 10

1.382 𝑥 10^23 m^2kg/s x K