Ideal gases Particles

have no volume. have elastic collisions. are in constant, random, straight-line motion. dont attract or repel each other. have an avg. KE directly related to Kelvin

temperature

Particles have no volume. have elastic collisions. are in constant, random, straight-line motion. dont attract or repel each other. have an avg. KE directly related to Kelvin

temperature

Particles have no volume. have elastic collisions. are in constant, random, straight-line motion. dont attract or repel each other. have an avg. KE directly related to Kelvin

temperature

Particles have no volume. have elastic collisions. are in constant, random, straight-line motion. dont attract or repel each other. have an avg. KE directly related to Kelvin

temperature

TemperatureTemperatureTemperatureTemperature

At constant tempereture At constant tempereture

At constant temperature the volume of agiven mass of a gas varies inversely withthe absolute pressureAt constant temperature the volume of agiven mass of a gas varies inversely withthe absolute pressureAt constant temperature the volume of agiven mass of a gas varies inversely withthe absolute pressureAt constant temperature the volume of agiven mass of a gas varies inversely withthe absolute pressure

At constant temperature the volume of agiven mass of a gas varies inversely withthe absolute pressureAt constant temperature the volume of agiven mass of a gas varies inversely withthe absolute pressureAt constant temperature the volume of agiven mass of a gas varies inversely withthe absolute pressureAt constant temperature the volume of agiven mass of a gas varies inversely withthe absolute pressure

P1V1 = P2V2P1V1 = P2V2

P1V1 =P2V2 138 x 10 = 1 x V2 V2 = 1380 l

P1V1 =P2V2 138 x 10 = 1 x V2 V2 = 1380 l

Effect of increasing temperatureEffect of increasing temperature

At constant pressureAt constant pressure

At constant pressure, volume of a givenmass of gas varies directly with absolutetemperatureAt constant pressure, volume of a givenmass of gas varies directly with absolutetemperatureAt constant pressure, volume of a givenmass of gas varies directly with absolutetemperatureAt constant pressure, volume of a givenmass of gas varies directly with absolutetemperature

At constant pressure volume of a givenmass of gas varies directly with absolutetemperatureAt constant pressure volume of a givenmass of gas varies directly with absolutetemperatureAt constant pressure volume of a givenmass of gas varies directly with absolutetemperatureAt constant pressure volume of a givenmass of gas varies directly with absolutetemperature

At constant volumeAt constant volume

If the volume is kept constant, absolutepressure of a given mass of a gas variesdirectly with the absolute temperatureIf the volume is kept constant, absolutepressure of a given mass of a gas variesdirectly with the absolute temperatureIf the volume is kept constant, absolutepressure of a given mass of a gas variesdirectly with the absolute temperatureIf the volume is kept constant, absolutepressure of a given mass of a gas variesdirectly with the absolute temperature

If the volume is kept constant, absolutepressure of a given mass of a gasvariesvaries directly with the absolutetemperature

If the volume is kept constant, absolutepressure of a given mass of a gasvariesvaries directly with the absolutetemperature

If the volume is kept constant, absolutepressure of a given mass of a gasvariesvaries directly with the absolutetemperature

If the volume is kept constant, absolutepressure of a given mass of a gasvariesvaries directly with the absolutetemperature

In a mixture of gases, pressure exerted byeach gas is the same as that which it wouldexert if it alone occupied the containerIn a mixture of gases, pressure exerted byeach gas is the same as that which it wouldexert if it alone occupied the containerIn a mixture of gases, pressure exerted byeach gas is the same as that which it wouldexert if it alone occupied the containerIn a mixture of gases, pressure exerted byeach gas is the same as that which it wouldexert if it alone occupied the container

P = P1 + P2 + P3 + PnP = P1 + P2 + P3 + Pn

Equal volumes of different gases at sameTemperature and Pressure contain equal

number of moleculesEqual volumes of different gases at sameTemperature and Pressure contain equal

number of moleculesEqual volumes of different gases at sameTemperature and Pressure contain equal

number of moleculesEqual volumes of different gases at sameTemperature and Pressure contain equal

number of molecules

At same Temperature and Pressure,equal number of molecules of

different gases occupy same volumeAt same Temperature and Pressure,

equal number of molecules ofdifferent gases occupy same volumeAt same Temperature and Pressure,

equal number of molecules ofdifferent gases occupy same volumeAt same Temperature and Pressure,

equal number of molecules ofdifferent gases occupy same volume

Pressure = 1 atm (100 kpa) Temperature = 273.15 K (0 C) No of molecules = 1 mole (6.022 x 10 )

Volume 22.4 L

Pressure = 1 atm (100 kpa) Temperature = 273.15 K (0 C) No of molecules = 1 mole (6.022 x 10 )23

Volume 22.4 L

H2 = 2gO2 = 32gN2O = 44g

H2 = 2gO2 = 32gN2O = 44g

Volume 22.4 L

H2 = 2gO2 = 32gN2O = 44g

H2 = 2gO2 = 32gN2O = 44g

Volume 22.4 L

44 g of N2O = 22.4 l44 g of N2O = 22.4 l44 g of N2O = 22.4 l44 g of N2O = 22.4 l

2.24/224 = 1%2.24/224 = 1%

R = Universal Gas ConstantR = Universal Gas Constant

V RT

Assessing the contents in a gas cylinder

P nV RT

Assessing the contents in a gas cylinder

Gas A Gas B

Critical Temperature

The temperature above which a gas can not becompressed in to a liquid

The temperature above which a gas can not becompressed in to a liquid

Critical Temperature

The temperature above which a gas can not becompressed in to a liquid

The temperature above which a gas can not becompressed in to a liquid

(Critical Pressure)(Critical Pressure)(Critical Pressure)(Critical Pressure)