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Chapter 16
What is PChem & Properties of Gases
26
Chemistry
Undergraduate 4
09/01/2011

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Cards

Term
what are the three areas of P chem
Definition
thermodynamics, quantum mechanics, & chemical kinetics
Term
when looking at a graph, which portion pertains to physical chemistry
Definition
the X-axis which can include units of wavelength, velocity and time
Term
when do gases behave ideally
Definition
when there are low concentrations of them
Term
what is the ideal gas law
Definition
PV=nRT
Term
in p chem, the more widely used equation, derived from the ideal gas law, is what
Definition

Pv(bar)=RT

 

v(bar)= V/n

Term
how can pressure be derived
Definition

P=F/A

 

force per unit area

Term
besides writing pressure as: F/A, how else can you write it
Definition

(1) F=mg

(2) m=V(p) (volume & density)

(3) F/A=(p)h(A)g/A

(4) P=p(h)g

 

Pressure equals density * height * gravity 

Term
what are the units for ideal gas laws
Definition
liters per mole
Term
how does the complexity of a structure affect its affinity to follow the gas law
Definition
as molecules become more complex, they tend to deviate from the ideal gas law
Term
what did van der Waals do to receive the Nobel Prize
Definition
for his work on the equation of state for gases and liquids
Term
what does extensive variables mean to you
Definition
that they are directly proportional to the size of the system
Term
what are examples of extensive variables
Definition
mass, volume and energy
Term
what does intensive variables mean to you
Definition
they are not directly proportional to the size of the system
Term
give examples of intensive properties
Definition
pressure, temperature and density
Term

when we divide an extensive property by the number of moles in the system we get an 

 

take for instances V

Definition
intensive variable called V (bar)
Term
calculate the pressure exerted by a 76.00 cm column of mercury.  take the density to be 13.596
Definition
~1.0133 x 10^(6) g*cm-1*s-2
Term
how would you solve a problem that asks you to convert pressure to pascals
Definition

x(10^-6) is our imaginary pressure

 

x(10^-3)(100)

 

x^5

Term
what is 1 atm
Definition
defined as 1.01325 x 10^5 Pa
Term
what is 1 bar
Definition
equal to 10^5 Pa
Term
what is the relationship between 1 atm and 1 bar
Definition
1 atm= 1.01325 bar
Term
what is 1 torr
Definition
1/760 atm
Term
what is the definition of T (temperature)
Definition
T equals the limit as P approaches zero P times V bar divided by R
Term
in the context of defining temperature, what is the lowest possible temperature
Definition
since P and V bar cannot take on negative values, the lowest possible value for temperature is 0K
Term
there is no fundamental limit to the maximum temperature, but what is the highest temperature laboratories have reached
Definition
100 million Kelvins
Term
what does PV bar equal
Definition
22.414 L*atm*mol-1
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