Home > Uncategorized > Thermodynamics and Kinetics Lecture 3: Heat Capacity and Expansion

Thermodynamics and Kinetics Lecture 3: Heat Capacity and Expansion

Overview
Today’s lecture costs 52 minutes.

Details
Work = Fd
+W means that work is done on the system, -W is the work done by the system
Heat and work are both path dependent. +Q is adding heat to the system.
A reversible path yields the most energy out.

U(T,V)
dU= (dU/dt)v + (dU/dV)t = heat capacity + joule free expansion

Heat capacity relates head added to temperature change. Path dependent.

With constant volume, dq = Cv dt. With constant pressure, dq = Cp dt. To find the total heat, take the integral.

Joule in 1840s. Cannon barrels, alot of heat generated. Discovered work and heat. On honeymoon, mtn resort, near bottom of a waterfall. The water at the bottom hotter than water at the top. Gravity does work.

dt = q/Cp
Cp is the constant pressure heat capacity
A candle heating a beaker is equal to a falling mass powering a agitator n the beaker. Work = mgh. dt = W/Cp.

Int (dw + dq) = 0
dU = dq + dw
dU = U2-U2=W + q
U universe = U surr + U sys

Isothermal gas expansion. Constant T. No ext P.
U, q, and w. Given 2, you can find the last one.

Constraints:
Reversible – dU=dq-pdV
Isolated dq=0, dw=0, du=o
Adiabatic close dq=0 du=dw
Constant volume dw=o, du=dQv
Isothermal dU=O

dU = (dU/dT)vdT + (dU/dV)T dV = Cv dT + Ct dV

Review
Oh my, such great apple pie!” (oxalic, malonic, succinic, glutaric, adipic, pimelic)
Kingdoms of Nature: Plants, Animals, Bacteria, Protists, Monera
Intermolecular Forces: ionic, hydrogen bonding, dipole dipole, VdW
“NAVEL” for Nerve, Artery, Vein, Empty Space and Lymph
Atm: N2, O2, H2O, Ar, CO2, Ne
UV rays: 400-10nm, 3ev-124
10-100 nm is ionizing
Rf = distance component/distance solvent
viscosity – internal friction

The C≡C bond distance of 121 picometers
the C=C distance in alkenes (134 pm)
the C-C bond in alkanes (153 pm).

terminal/internal alkynes

1. Be Offensive
2. Honor Your Professionals
3. Own the Street
4. Know Your History
5. Do Not Ignore Analysis
6. Do Not Be Parochial
7. Train Your People
8. Do Not Be Shoved Aside
9. Do Not Stay Too Long

Resolution = seperation
CH2=CHCH2SCH3 AMS allyl methyl sulfide

Ag has the highest electrical and thermal conductivity, Ag+
C6H12O6 = 2C2H5OH + 2CO2 + 2ATP
The stronger the interactions between the polar analyte and the polar stationary phase (relative to the mobile phase) the longer the elution time.
Each eye has six muscles that control its movements: the lateral rectus, the medial rectus, the inferior rectus, the superior rectus, the inferior oblique, and the superior oblique.
4 classes of blood loss
Class I -15% blood volume
Class 2 15-30 tachycardia, pallor
Class 3 30-40
CLass 4 40+ resusictation
Octasulfur is S8 in a puckered ring.
Source Holding: search, silence, segregate, speed, safeguard, tag
BLISS – blend in, low, irregular, small, secluded
METT-TC: mission enemy troops terrain time civilians
SALUTE size activity location unit time equipment
Sternum: manubrium, body, xyphoid process (suprasternal/jugular notch)
Stomach: fundis, body, pylori
Small intestine: duodnum, jujunum, ileum
pi donor ligands/weak field ligands/high spin
pi acceptor ligand/strong field ligand/low spin complex
Ambush: category – hasty/deliberate, type – point/area, formation- linear/L shaped.
LACE liquid ammunition casualties equipment
Ag has the highest electrical and thermal conductivity, Ag+
C6H12O6 = 2C2H5OH + 2CO2 + 2ATP
Maltose is two glucoses.
Sucrose is glucose and fructose.
Lactose is glucose and galactose.
Fire: O2, fuel, heat, chain reaction
Stomach: fundis, body, pylori
Prisoner Handling: search silence segregate speed safeguard tag
N2 + 3 H2 ⇌ 2 NH3 + 92kJ
Redfield Ratio C:N:P 106:16:1
Air = N2, O2, Ar, CO2, Ne
AFR air fuel ratio
Air: Fuel 14.7:1
14.7 lean
The lower the excess air, the richer the flame.
n-pentane, isopentane, neopentane
C4H9Li + H2O → C4H10 + LiOH
cetane being an old name for hexadecane
alkane – alcohol-aldehyde-COOH
The higher the excess air, the leaner the flame
“Evil is a word used by the ignorant and the weak. The dark side is about survival. It’s about unleashing your inner power. It glorifies the strength of the individual.”
There is no peace, there is only passion
Through passion I gain strength,
through strength I gain power,
through power I gain victory,
through victory, my chains are broken
the Force will set me free

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