Chem 1115 Unit 6 – Flashcards

Indefinite shape

Indefinite volume

Particles widely seperated

Particles moving rapidly

indefinte shape

fixed volume

particles in close contact

particles can move past one another

fixed shape

fixed volume

particles in close contact

particles vibrate around a central position

Theory that a gas contains small particles in constant random motion that have no attractive or repulsive forces between them or the walls of the container, are very far apart from each other with a very small negligible total volume compared to the container it occupys,

and has an average kinetic energy proportional to absolute temperature

P(Pressure)=F(Force)

                  A(Area)

at a constant amount of gas at a constant temperature

V(Volume) is inversely related to P(Pressure)

For a fixed (constant) amount of gas at a constant pressure

T(Temperature) is directly proportional to V(Volume)

                  V₁/T₁=V₂/T₂                     

Temperature must be in Kelvin  

                   K=^°C+273                                  

P₁V₁/T₁=P₂V₂/T₂

       Moles stay constant and Temperature in K(Kelvin)                     

Standard temperature and Pressure

Standard temp= 0;C or 273K

Standard Pressure= 1 atm or 760 torr

At STP the volume occupied by 1 mol of any gas is 22.4L

22.4L/mol is the standard molar volume of a gas

Molar Mass= dRT/P

;;;;;;;;;;;;;;;;;;

the moles of a substance in a mixture compared to the total moles in the mixture.

Can be expressed

_{XA= nA =} P_A

      _nT   P_T

the rate of; effusion of a gas is inversely proportional to the square root of the density of the gas.

;

The energy of motion.

;

KE=1/2m(mass)V²(velocity)

heat but is not the same as heat energy.

EX: Bucket of warm water has more heat energy than a match because it has more mass

The internal energy(E) plus Pressure X Volume

;

H=E+PV

q=;H_fus X moles

;

q=;Hvap X moles