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Relatino betwene work and energy
w = E_kf-E_ki
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Kinetic Energy
Energy posessed by a body by virtue of being in mostion
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Potential ENergy
Energy posessed by a body by virtue of position
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System
A specific segmentof hte world with deffinite boundaries on which we focus our attention
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Surroundings
The part of the world immediately surrounding a system
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Universe
System and its surroundings
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Open system
Can transfer heat and material
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Closed system
Can only transfer heat
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Isolated system
Can transfer neither heat nor matter
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Intensive property
Not a function of quantity
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Extensive propety
Directly a function of quantity
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Equation of state
An equation that describes the condition of a system as a function of intensive properties
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Equilibrium
The systems variables of state are not changing with respect to time
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Heat
The kinetic energy of molecualr motion
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Zeroeth law of thermodynamics
- If A and B are in thermal equilibrium
- And B and C are in thermal Equilibrium
- Then A and C are in thermal Equilibrium
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Boyles Law
Applies under Isothermic Conditrions. If temperature and nubmer of mols are held constant then PV=Constant
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Isotherm
Temperature is held constant
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Isobaric
Pressure is held constant
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Gay-Lussacks Law
If Pressure and mols are fixed then V/T =Constant
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3 Assumptions of ideal gas law
- 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.
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N
Number of molecules present
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Pressure in terms of mean square speed
P= 
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Average Kinetic Energy of a molecule in a system
e=. 
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Partial Pressure
Pressure exerted by a single component of a gas mixture. Defined by molar fraction* pressure total
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Grahms law of Effucsion
R 
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Collision frequency
- How many collisions pe second does a molecule experieince
- units : 1/s
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Collision Density
- How many colisions per unit of second per volume occur?
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Mean free path
- How far a molecule travels before a collision
- distnace
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ump
Most probable velocity. Peak of maxwell curve
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z
- Compression factor
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z>1
Repulsive forces dominate (b term from nonideal gas)
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Z<1
Attractive forces dominate (a term)
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Van Der Waals equation
Uses a to account for attraction and b to account for repulsion
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