Flashcards in Gas Chem Deck (18):
What are the most important properties for gas?
Pressure, volume, temperature
Kinetic molecular theory is based on
Gas take up almost no space, gas is in constant motion moving in straight lines at constant speeds, gas experience no intermolecular forces, gas kinetic energy is proportional to temp
What type of collision happen between gas molecules?
What is an ideal gas?
One that meets the kinetic molecular theory requirements
If amount of gas and pressure remains the same, what is volume proportional to?
Volume is proportional to temperature
If pressure is constant then a gas will expand when heated and contract when cooled
If the temperature is constant, what is the relationship between pressure and volume?
Pressure and volume are inversely proportional
If volume decreases less space is available so gas hits walls and pressure increases
If volume is constant what is the relationship between pressure and temperature?
Pressure and temperature are directly proportional
What is standard molar volume?
Volume that one mole of gas occupies at zero degrees Celsius and 1 atm
If there are deviations to ideal gas law when does this usually happen?
High pressure and low temp. Gas particles may have volume
At high pressures and low temp what happens?
Intermolecular forces form and less momentum is transferred
What is the exception to the ideal gas law dealing with volume?
Individual gas particles have volume and at high pressures must be accounted for. This decreases volume. Van dear Waals equation is used
Dalton's law of partial pressure
Total pressure equals sum of partial pressures
Number of molecule over total molecules
Graham's law of effusion
If gas have diff molar masses heavier molecules will move slower than lighter ones. RMS tells how much faster lighter gas will move
Do molecules of two diff gases that have same temp have the same kinetic energy?