Essay About H Products And 3.0E8 M

Chemistry Study Guide
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Chemistry Study Guide
Oct 2nd 1 hour Exam
Chapter 9- Thermodynamics
KE= Ð mv2
w= F∆x
w= force Ч distance
∙ A state function refers to a property of the system that depends only on its present state.
∙Internal Energy = heat + work
∆E = q + w
∙Pressure = Force/Area = P = F/A
∙Work= – external pressure Ч change in volume
w = – P∆V
Enthalpy
H = E + PV
qp = ∆E + P∆V
∆H = qp
∆H = H products – H reactants
Ideal Gas Law
PV = nRT
Energy “heat” = 3/2 R∆T
Cv = 3/2 R = “heat” required to change the temp of 1 mol of gas by 1K at constant
volume
Energy required = “heat” –
energy needed
energy needed to do
to change the translational
the PV work
energy
Cp = 3/2 + R = 5/2 R
= Cv + R = Cp
E = 3/2 RT (per mole)
∆E = Cv∆T (per mole)
∆E = nCv∆T
“Heat” required = qp = nCp∆T
= n (Cv + R) ∆T
= nCv∆T + nR∆T
(∆E) (PV)
∆H = ∆E + ∆(PV)
∆H = nCp∆T
Energy released = energy absorbed
= m Ч Cp Ч ∆T
(mass)(specific heat)(change in Temperature)
∆E = q + w = q= qv
Bomb calorimeter =
∆H = ∆TCp
Chapter 12
c = λν
speed of light (3.0E8 m ) = (wavelength)(frequency)
∆E = nhv or
∆E = hv if n=1
Plancks constant = h= 6.626 Ч 10-34 J s
Ephoton = hv = hc/λ
KEelectron = Ð… mv2 = hv – hvo
E=mc2
De Broglie
λ = h/mv
PE = -Z e2/r
Z= atomic number
R= distance between nucleus
Ηψ = Εψ
Ψ2 = Probability Density
n = energy level
l = shape
ml = orientation
ms = spin
Effective nuclear charge = Zeff = Zactual – effect of electron-electron repulsion
1 eV = 1.602 Ч 10-19 J