Equations have been derived based upon a reevaluation of the enthalpy and heat-capacity data of UO sub 2 . We recommend a three-term nonlinear equation below 2670 K, with terms representing contributions from phonons, volumetric thermal expansion, and electrons, and a linear equation above 2670 ...
Measurements of the enthalpy and derived heat capacity values for phosphoric acid were extended into the ranges of concentration (72.3-84.8% P2O5) and of temperature (25-200°C) that are of direct interest in the technology of superphosphoric acid. The results were combined with previous data to...
The mixing enthalpies of liquid binary iron-nickel, nickel-chromium and iron-chromium alloys were measured by levitation alloying calorimetry. The mixing enthalpy of iron-nickel alloys is asymmetric and was described by an equation accor... U Thiedemann,M R?Sner-Kuhn,DM Matson,... - 《Steel...
Enthalpy or heat of adsorption can mathematically be represented by the Van’t Hoff equation, given by (5.21)ΔHRT2=∂InP∂Ta where ΔH is the enthalpy or heat of adsorption, P is pressure, T is temperature, and a is the adsorption amount. Upon integration, (5.22)ΔHRT=InP+C ...
An equation of state for hydrogen fluoride The calculated fugacity coefficient, vapor compressibility factor, heat of vaporization, and enthalpy departure of hydrogen fluoride exhibit significant deviations ... Chorng,H.,Twu,... - 《Fluid Phase Equilibria》 被引量: 22发表: 1993年 A chemical compari...
Differential element for energy equation in Cartesian coordinates (4.7)∂∂xk∂T∂x+∂∂yk∂T∂y+∂∂zk∂T∂z+q.v=ρcp∂T∂t, where q.v is the rate at which energy is generated per unit volume of the medium and ρcp∂T/∂t=E.v is the time rate of ...
To provide theoretical basis for the design and operation of a marine supercharged boiler,an enthalpy-entropy graph of the entire working process was created and the parameters andheat equilibriumof flue gas at different compression ratios were analyzed. ...
Experimental work was performed using a macrocalorimeter to get the combustion heat and sublimation enthalpy was determined measuring the equilibrium vapor pressure in equilibrium with the vapor phase at different temperatures through the Clapeyron-Claussius equation. Theoretical calculations were made ...
Thermopiles located at the air inlet and exit ports of the test chamber measure the enthalpy rise of the air stream caused by burning of the sample and are used to compute the heat release rate after calibration with a metered methane flame. A 15 cm square test specimen having the ...
Entransy balance equations and the corresponding optimization principles for heat conduction, heat convection and thermal radiation have been established. This paper develops the entransy balance equation for a low speed steady flow system with vaporization processes. The definition of enthalpy entransy for...