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4 days ago · The van der Waals equation, named for its originator, the Dutch physicist Johannes Diderik van der Waals, is an equation of state that extends the ideal gas law to include the non-zero size of gas molecules and the interactions between them (both of which depend on the specific substance).
1 day ago · In this paper, a kinetic Boltzmann model equation with internal degrees of freedom is established for thermodynamic non-equilibrium multi-component polyatomic gas mixture by using continuous energy levels to deal with rotational energy and vibrational energy. The normalization and conservativeness of the kinetic model are analyzed and proved.
23 hours ago · The Boltzmann equation for the distribution function of a gas in non-equilibrium states is still the most effective equation for studying transport phenomena in gases and metals. By introducing the concept of thermodynamic probability as the number of microstates corresponding to the current macrostate, he showed that its logarithm is proportional to entropy.
5 days ago · B is the Boltzmann constant. From information theory, Shannon showed that Eq.(1) is a particular case of a more general equation for entropy, S= −k B X i p ilog(p i) (2) where p iis the probability of occurrence of the i-thmicrostate of the thermodynamic system. In this formula, entropy is a measure of the information content of the system ...
4 days ago · Formula in cgs units. In physics, Planck's law (also Planck radiation law[ 1 ]: 1305) describes the spectral density of electromagnetic radiation emitted by a black body in thermal equilibrium at a given temperature T, when there is no net flow of matter or energy between the body and its environment. [ 2 ]
5 days ago · The bulk material thermodynamic properties can be studied with regards to the individual molecules. The two central quantities in statistical thermodynamics are the Boltzmann factor and the partition function. Boltzmann factor P(E_i )= 1/Z exp^(-βE_i) Where. β= 1/(k_B T) Partition Function. Z= ∑_s e^(-βE_s ) Where. β= 1/(k_B T)
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2 days ago · For the equation a b c d A + B C + D, 𝐾 is calculated as the product of the partial pressures C and D divided by the product of the partial pressures of A and B, where each individual partial pressure is raised to the power of their respective stoichiometric coefficients c, d, a, and b.
