Thermal Physics formulae Flashcards
From Fahrenheit to Celsius
9/5 (T) + 32
From Celsus to Fahrenheit
5/9 (T- 32)
From Celsius to Kelvin
T + 273
Specific temperature from ice and steam point
@ = T@ - P / P100 - P
Absolute Kelvin Temperature
T = P / P (tr) x 273.16
Linear expansion
@ = L2 - L1 / L1 x @
Thermal Stress
F = YA&<>T
Molar heat capacity
Molar mass x Specific Heat Capacity
Quantity of heat related to molar mass
Q = nC<>@
Quantity of heat transfer in solid
Q = ktA x temperature gradient
Rate of energy radiation
H = ?AET^4 H = Q / T
Molar gas equation
pV = nRT = NkT
n = N/N(A)
k = R/N(A)
Root mean square speed
3RT/M = | 3kT/m
Molar specific heat
Q = nC<>@
C(v) and C(p) for ideal monoatomic gas
3/2R, 5/2R
Adiabatic process
No heat transfer
U = W
Workdone by a gas in adiabatic expansion
W = 1/Y-1 (P1V1 - P2V2)
Workdone by a gas in isothermal expansion
W = nRTIn (V2 - V1)
Thermal efficiency
eH - eL/ eH x 100% = efficiency
