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PY1010 semester 1
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intensive state variables
Variables that dont scale w size of system you’re studying e.g. pressure, temp
Extensive state variables
variables that do scale w size of system you're studying e.g. mass
Temperature in kelvin
TK = T°C + 273.15
Temperature difference
ΔT = T2 - T1
Change in heat energy
ΔQ = mcΔT
What does c mean in change in heat energy formula
specific heat capacity (J/kg/K)
Phase transitions
energy absorbed/ released during phase changes
Latent heat of transformation
L = Q/m
(Thermal transport) conduction
Q = KhA(ΔT/L)t
Efficient in dense media - solid to solid, solid to water
(thermal transport) convection
P = Ahc(Ts-T)
Efficient in liquids/ gases
(Thermal transport) radiation
P = AεσT 4
Any object at a temp of T radiates this power