energy equation
111Free energy perturbation — (FEP) theory is a method based on statistical mechanics that is used in computational chemistry for computing free energy differences from molecular dynamics or Metropolis Monte Carlo simulations. The FEP method was introduced by R. W. Zwanzig in …
112Gibbs-Duhem equation — ▪ chemistry thermodynamic relationship expressing changes in the chemical potential of a substance (or mixture of substances in a multicomponent system) in terms of changes in the temperature T and pressure P of the system. The chemical… …
113Free-energy relationship — In physical organic chemistry, a free energy relationship or linear Gibbs energy relation relates the logarithm of a reaction rate constant or equilibrium constant for one series of reactions with the logarithm of the rate or equilibrium constant …
114Acoustic wave equation — In physics, the acoustic wave equation governs the propagation of acoustic waves through a material medium. The form of the equation is a second order partial differential equation. The equation describes the evolution of acoustic pressure p or… …
115Hazen-Williams equation — The Hazen Williams formula can be used to calculate the pressure loss per one foot of pipe of a known diameter due to friction dependent on the flow. This equation is commonly used for pressure drop calculations in fire sprinkler systems, water… …
116einstein's photoelectric equation — noun Usage: capitalized 1st E Etymology: after Albert Einstein : an equation in physics giving the kinetic energy of a photoelectron emitted from a metal as a result of the absorption of a radiation quantum: Ek=hν ω where Ek is the kinetic energy …
117Sine-Gordon equation — The sine Gordon equation is a nonlinear hyperbolic partial differential equation in 1+1 dimensions involving the d Alembert operator and the sine of the unknown function. It was originally considered in the nineteenth century in the course of… …
118Constitutive equation — Many defining equations are in the form of a constitutive equation, since parameters of a property or effect associated matter are characteristic to the substance in question. A large number of other defining equations not specifically… …
119Langmuir equation — The Langmuir equation or Langmuir isotherm or Langmuir adsorption equation relates the coverage or adsorption of molecules on a solid surface to gas pressure or concentration of a medium above the solid surface at a fixed temperature. The… …
120Electromagnetic wave equation — The electromagnetic wave equation is a second order partial differential equation that describes the propagation of electromagnetic waves through a medium or in a vacuum. The homogeneous form of the equation, written in terms of either the… …
