enthalpy value

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• Enthalpy — Thermodynamics …   Wikipedia

• Enthalpy-entropy compensation — When a chemical reaction exhibits a linear relationship between enthalpy and entropy, one might observe what is known as an Enthalpy Entropy Compensation, where the magnitude of change in the Gibbs free energy is less than one might expect.… …   Wikipedia

• Enthalpy of vaporization — The enthalpy of vaporization, (symbol Delta{} {v}H), also known as the heat of vaporization or heat of evaporation, is the energy required to transform a given quantity of a substance into a gas. It is measured at the normal boiling point of the… …   Wikipedia

• enthalpy — /en thal pee, en thal /, n., pl. enthalpies. Thermodynamics. a quantity associated with a thermodynamic system, expressed as the internal energy of a system plus the product of the pressure and volume of the system, having the property that… …   Universalium

• Enthalpy change of solution — The enthalpy of solution (or enthalpy of dissolution) is the enthalpy change associated with the dissolution of a substance in a solvent at constant pressure. The heat of solution is one of the three dimensions of solubility analysis. It is most… …   Wikipedia

• Lower heating value — The lower heating value (also known as net calorific value , net CV , or LHV ) of a fuel is defined as the amount of heat released by combusting a specified quantity (initially at 25 °C or another reference state) and returning the temperature of …   Wikipedia

• net calorific value — (net heat of combustion at constant pressure), n the heat produced by combustion of unit quantity of a solid or liquid fuel when burned, at a constant pressure of 1 atm (0.1 MPa), under conditions such that all the water in the products remains… …   Coke&Coal Terminology

• Solvation — Solvation, commonly called dissolution, is the process of attraction and association of molecules of a solvent with molecules or ions of a solute. As ions dissolve in a solvent they spread out and become surrounded by solvent molecules. The… …   Wikipedia

• Donor number — In chemistry a donor number or DN is a qualitative measure of Lewis basicity. A donor number is defined as the negative enthalpy value for the 1:1 adduct formation between a Lewis base and the standard Lewis acid SbCl5 (antimony pentachloride),… …   Wikipedia

• Thermodynamic temperature — is the absolute measure of temperature and is one of the principal parameters of thermodynamics. Thermodynamic temperature is an “absolute” scale because it is the measure of the fundamental property underlying temperature: its null or zero point …   Wikipedia

• Thermodynamic databases for pure substances — Thermodynamic databases contain information about thermodynamic properties for substances, the most important being enthalpy, entropy, and Gibbs free energy. Numerical values of these thermodynamic properties are collected as tables or are… …   Wikipedia