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Chapter 5
Equations and such
25
Chemistry
Undergraduate 1
10/13/2008

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Term
STP
Definition
Pressure= 1.0 atm (or 760mmHg)
Temperature= 0*C
Term
1 torr = ? mmHg
Definition
1
Term
1 atm = ? Pa
Definition
101,325
Term
Boyle's Law:

If V increases, what does P do?
Definition
Decreases
Term
Charles's Law:

If T is lowered, V does what?
Definition
Decreases
Term
Charles's Law:

If T is raised, what happens to P?
Definition
Increases
Term
Avogadro's Law:

If you remove gas, what happens to V?
Definition
Decreases
Term
What is the proportionality constant?
Definition
R= PV/nT
R= 0.082057 (L*atm/K*mol)
Term
At STP, an ideal gas occupies what amount of Liters?
Definition
22.414L
Term
Equation for calculating molar mass of a gaseous substance:
Definition
M=dRT/P
Term
Root-mean-square (rms) speed (u rms) is:
Definition
An average of molecular speed.
Term
The gradual mixing of molecules of one gas with molecules of another by virtue of their Kinetic properties is the definition of:
Definition
Gas diffusion
Term
The process by which a gas under pressure escapes from one compartment of a container to another by passing through a small opening is the definition of:
Definition
Gas effusion
Term
Boyle's equation for calculating pressure or volume changes
Definition
(P1*V1)=(P2*V2)
Term
Charles's equation for calculating temperature or volume changes:
Definition
(V1/T1)=(V2/T2)
Term
Charles's equation for calculating temperature or pressure changes:
Definition
(P1/T1)=(P2/T2)
Term
Ideal Gas Equation
Definition
PV=nRT
Term
Combined gas equation for initial and final states:
Definition
[(P1*V1)/(n1*T1)]=[(P2*V2)/(n2*T2)]
Term
Equation for calculating changes in pressure, temperature, or volume when mols is constant:
Definition
[(P1*V1)/T1]=[(P2*V2)/T2]
Term
Equation for calculate the density of a gas:
Definition
d=(m/V)=[(P*M)/(R*T)]
Term
Mol fraction equation:
Definition
Xi=(ni/nt)
Term
Dalton's Law of partial pressure calculation:
Definition
Pi=Xi*Pt
Term
Equation for root-mean-square speed of gas molecules:
Definition
u rms= square root of(3RT/M)
Term
Grahm's Law of diffusion/effision equation:
Definition
[(r1/r2)/square root of (M2/M1)]
Term
van der Waal's Equation for calculating pressure of a non ideal gas:
Definition
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