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Chem test 3

# Chem test 3 - C hapter 5 Gases Pressure= force/area the...

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Chapter 5: Gases Pressure= force/area; the force exerted per unit area by gas molecules as the strike the surfaces around them o Metric units: N/m , where n=newtons Other possible units: atm, mmHg, Pascals, inHg, Torr, psi 1 Pa= 1 N/m ; 1 atm= 101,325 Pa ; 1 atm= 29.92 inHg ; 1 atm= 14.7 psi ; 1 mmHg= 1 torr ; 1 atm= 760 mmHg Boyles Law: (V proportional to 1/P) as volume decreases, pressure increases (P1V1=P2V2) Charle’s Law: Volume is proportional to Temperature Avagadro’s Law: V is proportional to n(# of moles) Ideal Gas Law: PV=nRT o P=nRT/V; n/V is same as density/molecular weight Partial Pressure: the pressure associated with a specific gas in a mixture of gases; P(total)= Pi Mole Fraction: ( χ ) ratio of moles in a gas mixture; χ a=na/nt(moles total) STP has T of 0 degrees Celsius and P of 1atm States of Matter: o Gas: density is low and volume is indefinable, temp. @100 degrees Celsius o Liquid: density is medium and volume is defined, temp. @20 degrees Celsius o Solid: density is high and volume is defined, temp. @0

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Chem test 3 - C hapter 5 Gases Pressure= force/area the...

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