P = pressure

nivedh_89

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
Boyle?s 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 Boltzmann?s 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_P and c_V for an ideal gas
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 ? = rod length
Thermal resistance R and R-factor R_f
Wien?s 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

heat added/lost while changing: temperature in a constant state
latent heat of fusion (melting)
latent heat of vaporization (vaporizing)
law of heat exchange, within a closed system
conductivity	K is the thermal conductivity of the material
radiation	s is the Stefan-Boltzmann constant and equals 5.67 x 10^-8 W m^-2 K^-4 e represents the emissivity of a black body: 1 for a perfect absorber [rough, dark surface] and 0 for a perfect reflector [bright, shiny surface]
power in a battery or resistor
heat produced in a resistor "rate of heat" production
mechanical equivalent of heat
linear expansion

Community Contributions - Articles by goIITians

P = pressure

N = number of molecules

k = 1.38066 x 10-23 J/K Boltzmann?s 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 Boltzmann?s 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