enthalpy

(redirected from Enthalpy change)
Also found in: Dictionary, Medical, Encyclopedia, Wikipedia.
  • noun

Synonyms for enthalpy

(thermodynamics) a thermodynamic quantity equal to the internal energy of a system plus the product of its volume and pressure

References in periodicals archive ?
During cooling, the peak temperatures and enthalpy changes of EEA-based potassium ionomers showed substantial differences compared with those of EEA.
cond] = enthalpy change across condenser, J/kg (Btu/[lb.
No obvious enthalpy changes were observed in the polyurethane when exposed to a dry or the standard exposure with water spray due to its more hydrophobic nature.
The enthalpy change for chemical reaction in the numerator and denominator originates from the inter-diffusional flux contribution to the molecular flux of thermal energy (i.
Usually an enthalpy change above 200 J/g (or an adiabatic temperature rise higher than 150 [degrees] C) is thought to be of potential danger.
The specific enthalpy change of the endotherm at ~400[degrees]C is determined by calculating the area under the endothermic peak, and is found to be ~82 J[g.
The amount of heat transferred to the condensate in a current boiler was calculated using the mass flow rate and enthalpy change of the condensate/steam.
Figure 3 shows a comparison of saturated liquid enthalpy change of ammonia-water mixtures with respect to the enthalpy at zero ammonia mass concentration and plotted against ammonia liquid mass concentration at a pressure of 50 bar (725 psia).
Equation (A5) simply states that the total power is equal to the enthalpy change of the gas, times the gas flow rate, plus the enthalpy change of the liquid, times the liquid flow rate.
The integration of the endothermic melting and exothermic crystallization peaks were used to calculate the enthalpy change and their maximum as the melting and crystallization temperatures.
Reactivation heat COP is defined as the ratio of the dehumidification enthalpy change (assuming constant dry bulb) to the reactivation input energy.
The concept of solubility parameter has been frequently used for the prediction of miscibility of binary polymer blends, as the difference in solubility parameters of the blend components is directly related to their enthalpy change on mixing.
Figure 8 shows that the specific enthalpy change from 3' to 4' equals that from 6' to 1' using the heat exchanger in the liquidgas heat exchanger.
Since polymers have thermodynamic transitions over a range of temperatures, not at one specific temperature, we approximated the enthalpy change due to melting for PE using the specific heat curve (i.
This enthalpy is used as input in the microscopic cell model equations, where the microscopic calculations are performed in every element in smaller time-steps (micro time steps), until summation of micro time steps is equal to dt The microscopic enthalpy change (micro-enthalpy) is added to the macroscopic enthalpy change in order to update the temperature in each time step and is calculated as the latent heat of fusion ([H.