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40 Cards in this Set
 Front
 Back
What is pressure?

Force/area


What is force?

mass x acceleration


What is area?

pie x r squared


What is the definition of pressure?

the force of collision of gaseous particles with a surface per unit area


what is the si unit for force?

newton=kg m s2


what is the si unit for pressure?

pascal=1 Pa=1 N/m2=kg m/ s^2/m^2


What is atmospheric pressure?

defined as the pressure exerted by the earth's atmosphere


What is standard atmospheric pressure?

(1 atm)pressure that supports a column of mercury exactly = to 760 mm


how many mmHg, torr, and Pascals do one atmosphere =?

760 mmHg, 760 torr, and 101.325 Pa


What is a barometer?

a device used for measuring atmospheric pressure


What is a manometer?

a device used to measure the pressure of gases other than the atmosphere


What is a closed and open manometer?

closed manometerused to measure pressures below atmospheric pressure, openused to meausre


What is boyle's law?

P1V1=P2V2


What is Charles' and GayLussac's laws?

V1 = V2
  T1 T2 

What is the general gas law?

P1V1 = P2V2
  T1 T2 

What is avogadro's law?

dependence of volume on # of moles at constant T and P


What is the law of combining volumes?

in a chemical reaction at the same T and P, the volume ratio of gases is equal to the mole ratio


What is the definition of boyle's law?

pressure of a fixed amount of gas at a constant T is inversely proportional to the volume of gas


What is the definition of the Charles's and GayLussac's laws?

volume of a fixed amount of gas at a constant P is directly proportional to the absolute T or the gas


What is an hypothetical gas?

a hypothetical gas, whose pressurevolume temp. behavior is completely accounted for by the ideal gas equation


What is an ideal gas?

no forces between atoms, neglect volume of individual atoms in comparison to volume of container, the chemical identity of gas is unimportant in describing its behavior, all gases are created equal


What does the # of moles = to?

mass/Molar Mass


What is the formula for Molar mass?

dRT/P


What is partial pressure?

pressure of individual components in a mixture


What is Dalton's Law of Partial Pressures?

the total pressure of a mixture of gases is equal to the sum of the pressures that each gas would exert if it were present alone


What is the formula for partial pressure?

Pi= n1 RT
 V 

What is the total pressure formula?

Pt=the sum of the partial pressures


What is the definition of a mole fraction?

a dimensionless number that expresses the ratio of the # of moles of one component to the # of moles of all components present


What is the formula for mole fraction?

Xi=ni
 nT 

What is the formula for partial pressures?

Pi=XiPt


What is the formula for gas collected over water?

Pt=Pi + Ph20


Does water vapor increase or decrease with temperature?

increase with increased temp.


What is the Kinetic Molecular theory of gases?

a theory developed by Boltzman and Maxwell to explain the physical properties of gases in terms of their molecular motion.


What is the formula for kinteic energy?

energy of motion, KE=1/2 mu^2


What are the units of J for kinetic energy?

J=1 kg m^2 s^2


What is the average kinetic energy of a molecule formula?

__ ____
KE= 1/2mu^2 

What is the formula for the average kinetic energy per mole?

____ ___
KEmol = 1/2 Mu^2 

How does temperature relate to the average kinetic energy for an ideal gas?

they are directly proportionate


what does the average kinetic energy per mole depend on?and what is the formula?

temperature, __
KEmol=3/2 RT 

What is the relationship of the mean square speed to the temperature and the molar mass, M?

__
u^2= 3 RT  M 