Chem 1010 TEST 4
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5 properties of gasas
- Gases have an indefinite shape
- Gases can expand
- Gases can compress
- Gases have low densities
- Gases diffuse uniformly throughout their containers
All temp. calculations must be in?
The result of constantly moving molecules striking the inside wall of the container
collide with wall less frequently and less energy, results in a lower pressure
molecules that move more slowly
collide more often, so the gas pressure increases
Molecules move more rapidly
Measured by an instrument called a barometer
Standard pressure of Atmosphere?
Standard pressure of millimeters of Hg?
760 mm Hg
Standard pressure of torr
760 torr (exactly)
Equal standard pressure?
1 ATM= 760 mHg= 760 torr
Volume and pressure are?
inversely proportional. as pressure goes up, volume goes down.
Boyle's law is written?
As pressure goes up, temp?
Charles Law is written?
V1/T1 = V2/T2
n (mol) and P (pressure): As one goes up, ?
so does the other
At constant pressure, the volume, V, occupied by a gas sample is directly proportional to ?
At constant vlume, the pressure, P, exerted by a gas sample is directly proportional to ?
3 gas laws can be combined to represent the relationship between the three variables when they all change simultaneously
The combined gas law
molecules of water in constant motion
some strike the surface with enough energy to escape the gas phase
when in a closed container, the vapor is collected in the space above the liquid
vapor pressure of water is dependent on?
- the temp but not the volume of water.
- increases as temp increases
Ptotal = P1+P2+P3+.......
- Daltons Law of partial pressures
- (587torr N + 158torr O + 7 torr Ar = 752 torr)
a gas that always behaves in a predictable and consistent manner
an Ideal gas
behave very much like the ideal gas model except at low T and high P
Always use what Conversions for..
- P= ATM
- V= Liter
- N= mol
- T= Kelvin
demonstrate rapid motion, move in straight lines, and travel in random directions
the average kinetic energy of gas particles is proportional to the ?
have no attraction for one another. After colliding they simply bounce away in a different direction
An ideal gas at absolute zero has?
No kinetic energy and therefore no motion
in a collision between gas particles, there is no net loss of kinetic energy
referred to as the Ideal Gas constant, R
.0821 L atm/mol K
PV = nRT
Ideal gas constant, R
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