Physical chemistry Test 1

F*dl

kg m^2/s^2

.5 mu^2

w = E_kf-E_ki

Energy posessed by a body by virtue of being in mostion

Energy posessed by a body by virtue of position

A specific segmentof hte world with deffinite boundaries on which we focus our attention

The part of the world immediately surrounding a system

System and its surroundings

Can transfer heat and material

Can only transfer heat

Can transfer neither heat nor matter

Not a function of quantity

Directly a function of quantity

An equation that describes the condition of a system as a function of intensive properties

The systems variables of state are not changing with respect to time

The kinetic energy of molecualr motion

• If A and B are in thermal equilibrium
• And B and C are in thermal Equilibrium
• Then A and C are in thermal Equilibrium

Applies under Isothermic Conditrions. If temperature and nubmer of mols are held constant then PV=Constant

Temperature is held constant

Pressure is held constant

If Pressure and mols are fixed then V/T =Constant

mass

Molar Mass

PV=nRT

• 1) gas is assumed to be composed of individual particles whose actual dimensions are small in comparison to the distance between them.
• 2) These particles are in constant motion and therefore have kinetic energy.
• 3) Neither attractive nor repulsive forces exist between the particles.

Number of molecules present

P=

e=.

Pressure exerted by a single component of a gas mixture. Defined by molar fraction* pressure total

R

• How many collisions pe second does a molecule experieince
• units : 1/s

• How many colisions per unit of second per volume occur?
• 

• How far a molecule travels before a collision
• distnace

Most probable velocity. Peak of maxwell curve

• Compression factor
• =

Repulsive forces dominate (b term from nonideal gas)

Attractive forces dominate (a term)

Uses a to account for attraction and b to account for repulsion