P = pressure

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Physics Formulas for Thermodynamics

Temperature Conversion	T(°C) = 5/9 [T(°F) - 32°F] T(°F) = 9/5 T(°C) + 32°F T(K) = T(°C) + 273.15 K	T = temperature
Boyles Law for a gas		T = constant P = pressure V = volume
Charles Law for a gas		P = constant
Ideal Gas Law		N = number of molecules N_mol = number of moles k = 1.38066 x 10^-23 J/K Boltzmanns constant R = kN_A = 8.3145 J/(mol K) ideal gas constant
Translational kinetic energy K per gas molecule
Root mean square speed of a gas molecule		m = molecular mass
Internal energy U of a monatomic ideal gas
First Law of Thermodynamics		Q = heat added to system W = work done by system
Work done by an ideal gas
Specific heat c for a given process		M = Nm = total mass
Specific heat c_V of a monatomic ideal gas at constant volume
Specific heat c_P of a monatomic ideal gas at constant pressure
Ratio of specific heats
Relation between c_Pc_V for an ideal gas and
Adiabatic gas law		Q = 0
Work done by a monatomic ideal gas in an adiabatic process
Latent heat of fusion		where Q_L and Q_S are measured at the freezing point
Latent heat of vaporization		where Q_V and Q_L are measured at the boiling point
Linear expansion		where is the coefficient of linear thermal expansion
Volume expansion		where is the coefficient of volume expansion
Heat Capacity C
Heat transfer H along a rod		k = thermal conductivity A = cross-sectional area l= rod length
Thermal resistance R and R-factor R_f
Wiens displacement law	_maxT = 2.898 x 10^-3 K m
Power radiated		L = luminosity = 5.67 x 10^-8 W/m² K⁴ Stefan-Boltzmann constant = emissivity
Efficiency e of a heat engine
Efficiency of a reversible heat engine (Carnot cycle)		T_C = cold temperature T_H = hot temperature
Entropy change S
Ratio relation for a reversible engine

Community Contributions - Articles by goIITians

P = pressure

N = number of molecules

k = 1.38066 x 10-23 J/K Boltzmanns constant

m = molecular mass

Q = heat added to system

M = Nm = total mass

Q = 0

where QL and QS are measured at the freezing point

where QV and QL are measured at the boiling point

where is the coefficient of linear thermal expansion

where is the coefficient of volume expansion

k = thermal conductivity

L = luminosity

TC = cold temperature

k = 1.38066 x 10^-23 J/K Boltzmanns constant

where Q_L and Q_S are measured at the freezing point

where Q_V and Q_L are measured at the boiling point

T_C = cold temperature