| 1 |
Always remember |
Conservation of energy
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| 2 |
Specific heat |
The heat energy required to raise the temperature of a unit mass of a substance by one degree |
| 3 |
Heat absorbed or emitted by a substance due to a Δθ change in temparature |
Q= Mc Δθ
M is the mass of substance, c is specific heat
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| 4 |
Latent Heat |
The amount of heat absorbed or released when a substance changes its state
- latent heat of fusion (melting)
- latent heat of vaporization (boiling)
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| 5 |
Farenheit to Centigrade conversion |
Too simple right! C/5 = (F-32)/9
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| 6 |
Kelvin -- Centigrade -- Farenheit |
273.15 K = 0°C = 32°F |
| 7 |
Expansion due to heat
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Linear Expansion |
l=l0(1+ α t)
α is the coefficient of linear expansion
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Superficial Expansion |
S=S0(1+ β t)
&beta is the coefficient of superficial expansion
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Volumetric Expansion |
V=V0(1+ γ t)
γ is the coefficient of volumetric expansion
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α: &beta: &gamma = 1:2:3
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| 8 |
Conduction ---- Convection ---- Radiation |
Too easy... Let's move on |
| 9 |
Transmission of Heat by conduction |
Q = (kAΔθ/l)t
Where l is the separation between the two ends with temp. difference
k is the coefficient of thermal conductivity
t is time
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The case of Compound Slab |
Q = t(AΔθ)/(l1/k1)+(l2/k2)+(l3/k3)+... |
| 10 |
Newton's Law of Cooling |
ΔT/Δt ∝ ΔT
t -- time
T -- temparature
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| 11 |
Stefan's Law
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E = σ T4
|
|
Stefan's Constant |
σ = 5.67 x 10-8 Wm-2K-4 |
| 12 |
First Law of Thermodynamics |
Conservation of energy
ΔQ=ΔU + ΔW
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| 13 |
A few things you must revise in detail
|
Isothermal Process
Adiabatic Process
Isobaric Process
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| 14 |
Specific heat of a gas |
Depends on temparature and pressure |
| 15 |
Specific Heats for Gases
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|
Monoatomic Gas |
Cv = 3R/2
Cp = 5R/2
&gamma = Cp/Cv = 1.67
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Diatomic Gas |
Cv = 5R/2
Cp = 7R/2
&gamma = Cp/Cv = 1.4
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Polyatomic Gas |
Cv = 3R
Cp = 4R
&gamma = Cp/Cv = 1.33
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| 16 |
Ideal Gas
Real Gas
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PV = nRT
Use Van Der Waal Equation
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The topics covered in this section are written in a language to cover more important concepts in minimum time.
