gas laws

Question 1

perfect gas

Answer 1

A gas that obeys all 3 gas laws. Molecules so small they occupy no volume. Doesn’t exist, Hydrogen closest as lowest molecular weight

Question 2

boyles law

Answer 2

at a constant temperature, volume of fixed amount of perfect gas varies inversely with its pressure
PV = K. Used Oxygen cylinder litres available in atmosphere

Question 3

Charles’ law

Answer 3

at a constant pressure, volume of fixed amount of perfect gas varies in proportion to its absolute temperature
V/T = K

Question 4

Gay-Lussac’s law

Answer 4

third gas law. At a constant volume, the pressure of a fixed amount of a perfect gas varies in proportion to its absolute temperature. used in hydrogen thermometer

Question 5

avogadro’s hypothesis

Answer 5

equal volumes of gases at same temp and pressure contain equal numbers of molecules. 1 mole has 6.22 x 10 to the 23 molecules and occupies 22.4L

Question 6

universal gas equation

Answer 6

PV = nRT, pressure, volume, amount of gas, universal gas constant, temperature

Question 7

solid

Answer 7

molecules oscillate about mean position but arranged in tight lattice with stronge forces between them

Question 8

liquid

Answer 8

molecules have more energy than a solid and move freely but still have attrative van der waal forces beween them

Question 9

gas

Answer 9

molecules have enough kinetic energy to escape van der waal forces and move freely

Question 10

critical temp

Answer 10

temp above which gas can’t be liquefied regardless of pressure

Question 11

critical pressure

Answer 11

pressure needed to liquify gas at its critical temp

Question 12

daltons law of partial pressures

Answer 12

in a mixture of gases the pressure each gas exerts is the same it would exert if it alone occupied the same volume