Avogadro's Law
What does Avogadro's law directly relate?
Gas Volumes to Moles
What is R known as?
The Universal Gas Constant
What is the Relationship between Volume and Pressure?
If Temperature is constant, the Pressure of a Gas is inversely proportional to its Volume, therefore the product of Pressure and Volume is constant
What are the units most commonly used for Volume?
cm3/dm3
Calculate the volume occupied by 0.0200 g of He at Standard Temperature and Pressure.
0.114 dm3
What is the equation relating Moles of Gas to Molar Volume?
Number of Moles of Gas (n) = volume (V) / Molar Volume
What is the Ideal Gas Equation?
PV = nRT or (PV/T) = nR
What is the Relationship between Volume and Temperature?
If Pressure is constant, the Volume of a Gas is directly proportional to its Absolute Temperature, therefore Volume divided by Absolute Temperature is a constant
What is the unit for Temperature?
Kelvin (K)
The Molar Volume of Gas at STP is 22.7 dm3 mol-1. Calculate the molar volume at 25 oC at the same pressure.
24.8 dm3
What is Avogadro's law stated as?
Equal volumes of all gases, when measured at the same temperature and pressure, contain an equal number of particles
The relationship of Density = Mass/Volume
What is the Relationship between Pressure and Temperature?
If Volume is constant, the Pressure of a Gas is directly proportional to the Absolute Temperature, therefore Pressure divided by Temperature is a constant
What is the unit of Pressure?
Pascal (Pa)
A helium party balloon has a volume of 18.0 dm3. At 25 oC the internal pressure is 108 kPa. Calculate the mass of helium in the balloon.
What is the definition of Molar Volume on the basis of Avogadro's Law?
The volume occupied by one mole of gas
What does the Ideal Gas Equation enable us to do?
To calculate how systems respond to changes in pressure, volume, and temperature, and to calculate Molar Mass
What does Boyle's Law relate?
Volume and Pressure
What is Pressure commonly given in?
Bars (105 Pa = 1 Bar)
A sample of gas has a volume of 445 cm3 and a mass of 1.500 g at a pressure of 95 kPa and a temperature of 28 oC. Calculate its Molar Mass.
89 g mol-1
What does Avogadro's Law allow us to do?
To relate gas volumes, of any gas, to the number of moles
What is the Ideal Gas Equation derived from?
The Combined Gas Equation and Avogadro's Law
What does Charles' Law relate?
Volume and Temperature
What is the Temperature in Kelvin known as?
Absolute Temperature
A gas has a density of 1.65 g dm-3 at 27 oC and 92.0 kPa. Determine its Molar Mass
44.7 g mol-1