Properties and Behaviours of Gases
What state is compressible?
Gas
Name a KMT assumption
1. Gas particles are in constant, random movement
2. Gas particles have a defined mass but not a defined volume.
3. Gas particles don't repel or attract each other
4. Gas particles interact with each other and the container walls through elastic collision
5. Average Kinetic energy is proportional to the temperature
What does the unit 'atm' represent?
Standard atmospheric pressure.
Which force is the weakest?
Nonpolar forces between molecules
Which type of kinetic energy do particles spinning on an axis?
760 mmHg = ? torr
760 torr
(mmHg and torr are the same measurement)
____ forces require more kinetic energy to pull particles apart
Stronger
KMT is a theory that explains behaviour and properties of gases under ordinary ____ and ___?
KMT is a theory that explains behaviour and properties of gases under ordinary _temperatur_ and _pressure_?
0.8106 bar = ? atm
(round to 4 significant figures)
0.8000 atm (0.8106 bar ÷ 1.01325 bar = 0.7999~ = 0.8000 atm)
Increase pressure = ___ Volume
Decrease
What is an "Ideal Gas"?
A hypothetical substance that always obeys the gas laws, has a defined mass, but no volume or attractive forces
150 000 Pa = ? psi
21.8 psi
(150 000 Pa ÷ 101325 Pa = 1.48atm ; 1.48 atm x 14.7 psi = 21.8 psi)
Does calcium chloride (CaCl2) or phosphorus trichloride (PCl3) have a higher boiling point?
calcium chloride (CaCl2)
How is the volume of a gas affected by an increase in temperature?
Volume increases
The atmospheric pressure is reported as 29.92 mmHg (inches of mercury). Convert this to atm, then to kPa and Pa. (Hint: 1 inHg = 25.4 mmHg)
1. 1 atm (29.92 inHg x 25.4 mmHg = 760 mmHg ; 760 mmHg ÷ 760 mmHg = 1 atm)
2. 101.325 kPa (1 atm x 101.325 kPa = 101.325 kPa)
3. 101 325 Pa (1 atm x 101 325 Pa = 101 325 Pa)