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24 Cards in this Set
- Front
- Back
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physical states
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- solid liquid gas understood in terms of their constituent atoms, ions and molecules
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unit of pressure
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- standard atmospheric pressure defined as pressure needed to support a column of " Hg" 760 mm high
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pascal
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- pressure exerted when force of 1N acts on 1m square area
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formula of pressure
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- P= force/area
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bulk physical properties
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- measurable properties of gasses
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1 pascal
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- 1N / 1m squared
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write down the properties of gases?
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- expands spontaneously to fill container
- highly compressible - mixes with each other - excert pressure |
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solid
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- definite volume and shape
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liquid
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- definite volume and no definite shape
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gas
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- it has neither volume nor shape
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atmospheric pressure
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- pull of air by gravity to cover the earths surface
- also presses down on the earths surface |
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write down the four measurement of atmospheric pressure?
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- 1 atm = 760 mm Hg = 760 torr = 101325 Pa = 1.013 bar
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hows is the pressure measured
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it is measured in pascals
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manometer
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a u-shaped tube containing a dense liquid, usually mercury
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P gas = P atm
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height's of Hg in two arms are equal
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P gas ≤ P atm
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P total = P atm - P Hg
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P gas ≥ P atm
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P total = P atm + P Hg
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boyle's law
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at constant temperature is inversely proportional to the applied pressure
V ∞ 1/P or P1V1 = P2V2 |
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ideal gas law
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real gas behaves more and more like an ideal gas law as its temperature increases so as its pressure
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charles's law
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at constant pressure the volume of the gas is directly proportional to its temperature
V ∞ T or V1/T1 = V2/T2 |
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gay lussac's law
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at constant volume for a fixed amount of gas the pressure is proportional to the absolute temperature
P1/T1 = P2/T2 |
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combined gas laws formula
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PV/T = constant or
P1V1/T1 = P1V2/T2 |
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avegadro's Law
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at STP equal # of molecules = equal number of moles
volume of gas is directly proportion to number of moles at STP 1 mol = 22.4 L gas V1/n1 = V2/n2 |
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ideal gas law relates to the # of moles
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PV/T is proportional to number of moles "n"
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