GASES Flashcards
what is a gas
loose connection of weakly attracted atoms or molecules that move in random directions
What is more dense, a gas or a liquid
liquid
gas less dense than liquids
What is standard temperature and pressure for a gas
0°C and 1atm
Describe the miscibility of a gas vs a liquid
All gases are miscible with each other
whereas liquids are not
How does the ideal gas requirements differ from real gases
A model of an ideal gas was created to better understand the behaviour of gases.
The ideal gas assumes some characteristics that are not experienced by real gases.
What are the four rules and equation an ideal gas will follow
PV = nRT
- Molecules make completely elastic collisions.
- Molecules have zero volume.
- Average kinetic energy of gas molecules is directly proportional to the temperature of the gas.
- Gas molecules only exhibit forces due to collisions.
What is the ideal gas equation
PV = nRT
What is the model of an ideal gas called
the kinetic molecular theory
What is the universal gas constant
0.08206 L·atm·mol−1·K−1 or 8.314
What is Charles’ Law
Volume of a gas (V) is directly proportional to the temperature (in Kelvin)
(BUT ONLY WHEN pressure (P) and amount of gas (n) is kept constant)
Draw a graph of Charle’s law
Volume = y-axis Temperature = x-axis
Straight line top right diagonal line
What is Boyles Law
volume (V) of an ideal gas is kept at a fixed temperature (T) the pressure and volume are inversely proportional
What is the equation for Charles’ Law
V1/T1 = V2/T2
What is the equation for Boyle’s Law
P1V1=P2V2
what is STP
standard temperature and pressure (STP
