Gases

Question 1

Pressure

Answer 1

Force per area

Question 2

Standard temperature and pressure (STP)

Answer 2

273.15 K and 1 atm

Question 3

Ideal gas

Answer 3

A hypothetical gas whose molecules have no intermolecular forces and occupy no volume

Question 4

Boyle’s Law

Answer 4

For a given gaseous sample held at constant temperature, the product of pressure and volume is constant
Pressure and volume are inversely proportional

Question 5

Charles’s Law

Answer 5

At constant pressure, the quotient of the volume and temperature of a gas is constant
Volume and temperature are directly proportional

Question 6

Avogadro’s Principle

Answer 6

For all gases at constant temperature and pressure, the volume of the gas will be directly proportional to the number of moles of gas present

Question 7

Ideal Gas Law

Answer 7

PV = nRT

Question 8

Density

Answer 8

The mass per unit volume

d = m/V

Question 9

Dalton’s law of partial pressures

Answer 9

The total pressure of a gaseous mixture is equal to the sum of the partial pressures of the individual components

Question 10

Kinetic molecular theory

Answer 10

Gases are made up of particles whose volumes are negligible
Gas atoms are inert & exhibit no intermolecular attractions or repulsions
Gas particles are in continuous, random motion
Collisions are elastic
The average kinetic energy of gas particles is proportional to the absolute temperature of the gas

Question 11

Graham’s law of diffusion

Answer 11

Under isothermic and isobaric conditions, the rates at which 2 gases diffuse are inversely proportional to the square root of their molar mass

Question 12

Effusion

Answer 12

The flow of gas particles under pressure from one compartment to another through a small opening