1. The standard molar enthalpy of formation could have two different values depending on how we write the equation.

2. Thus, energy or enthalpy change alone can not help us to predict whether a reaction will occur or not.

3. Approximate measurements of the enthalpy change for reactions in solution can be made using a simple calorimeter such as a polystyrene beaker.

4. The experimental technique used for the determination of enthalpy is calorimetry.

5. We saw earlier in this chapter that the enthalpy change of formation was a measure of the stability of a compound.

6. The enthalpy is constant in the throttling process.

7. Only differences in enthalpy are of practical engineering interest.

8. The standard heat capacity, entropy, sublimation enthalpy of graphite.

9. But the argon plasma arc voltage, low enthalpy is not high, cutting ability is limited, and cut the air than the thickness of the cut about 25% lower.

10. New correlations of Excess Enthalpy is developed by combining the corresponding state principle and local components concept.

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11. The general corresponding-states equation of specific enthalpy of saturated liquid wasobtained.

12. A change in enthalpy also takes place when a change of phase occurs.

13. Curing shrinkage, temperature and curing enthalpy of benzoxazine based on diphenyl oxide resin were investigated.

14. An excess enthalpy equation is established based on this thermodynamic model.

15. These modified starch, low dextrinize enthalpy value, low crystallinity and extremely disarrangement of structure, have a better effect of lowering blood sugar value.

16. Its high melting enthalpy results in bigger crystal size lower super - cooling and poor spinnability.

17. New of Excess Enthalpy is developed by combining the corresponding state principle and local components concept.

18. The equivalent enthalpy drop method ( EEDM ) is equivalent to the habitual thermal balance method ( HTBM ) on the thermodynamic principle.

19. The cycle can be used to determine the lattice enthalpy of sodium chloride.

20. In general, as the difference in electronegativity between two elements forming a bond decreases,() so does the bond enthalpy.

21. Values of the solubility parameter for simple liquids can be readily calculated from the enthalpy of vaporization.

22. The Gibbs free energy change therefore takes into account the enthalpy change of a reaction system and its entropy change.

23. The unusual exothermal transformation of nacre aragonite to calcite is perhaps resulted from the stored excess enthalpy in nanometer-size aragonite of nacre.

24. These record of time and the change of calorimeter temperature, adopt Reynolds temperature correction to evaluate the change of calorimeter temperature, calculate the decompound enthalpy of solid.

25. Based on the physical principles and the bilinear fit functions of the enthalpy and density of superheated steam, a lumped parameter model of a section of super-heater was developed.

26. A mathematical model for heat transfer of PCM in storage cell based on the enthalpy method was developed.

27. Based on the theory of radial distribution function, a new unified model for excess enthalpy and excess Gibbs free energy of liquid solution was proposed.

28. Because what you actually measure in the lab are changes in enthalpy, just like what you measure when you look at energy change of some sort, you measure the change in energy, right.

29. Introduces and analyses the calculating software of steam parameters and enthalpy drop of adiabatic expansion.

30. The result shows that both the protonation of the ligands and the formation of metal complexes are controlled by the change of enthalpy.

31. What we define as zero is the enthalpy of every element in its natural state at room temperature and ambient pressure.

32. Because the hydrogen can significantly improve the arc voltage, make hydrogen plasma jet has high enthalpy, when mixed with argon plasma jet, the use of cutting ability is greatly increased.

33. It is used to test the performance of passenger car top loading air conditioner by using air enthalpy method.

34. Heat transfer coefficientcomprising convective and radioactive components may strongly depend on the actual enthalpy and density.

35. On the treatment of the latent heat of solidification, the temperature compensation method and enthalpy method are used.

36. The results show that the temperature difference of fluid takes on extreme point due to the non-linear relationship between temperature and specific enthalpy during the condensing process.

37. For the ECE method, the gas temperature is calculated based on gas components and their enthalpy.

38. The studies both on the enthalpy and on the free energy of adsorption manifest a physisorption process.

39. Increasing the main steam outlet temperature will increases the available enthalpy drop in the turbine.

40. The solvent effects, the compensation of the activation enthalpy ,[http:///enthalpy.html] and the activation entropy were discussed.

41. Using nonlinear programming theory and computer technique for the steam turbine regenerative system, the problem of the feed-water enthalpy rise optimal distribution is solved.

42. In the treatment of the latent heat of fusion, the temperature compensation method and enthalpy method are used.

43. Enthalpy is the amount of energy in a system capable of doing mechanical work.

44. Using enthalpy to deal with latent heat of solidification the numerical model is solved by finite element method, and a steady temperature field can be obtained under a certain condition.

45. It should be noted that, the entropy and temperature at the end point of a isentropic process may be calculated when the pressure ratio and initial enthalpy are known.

46. This brief communication introduces an experiment of hypersonic flow using high enthalpy expansion tube.

47. In this paper, the extrapolation formulas of rocket engine performance parameters are established utilizing one isentropic reference line and two partial derivatives for fixed enthalpy.

48. In studying air-cooling process with humidification or dehumidification, it is necessary to measure the enthalpy difference of air before and after the air-cooler.

49. Main control methods for intermediate-point superheat degree include water-fuel ratio control, enthalpy control, first-stage superheater spray correction, feedwater mild correction.

50. Low energy consumption high plasticity dynamic coextruding machine screw optimally designed with computer, with good mixing effect, even high enthalpy resin temperature and high viscosity of coating.

51. And Henry's law constant is going to tell you whether or not that enthalpy of interaction is favorable or not favorable.

52. Designed the background database model for the Enthalpy Potential test. It can queried preterit data and redraw the data curve.

53. The enthalpy of mixing increased with the increase of temperature and solute concentration.

54. A thermodynamic model of excess enthalpy with three parameters for binary liquid mixtures is established by introducing the internal pressure and energy of vaporization of components.

55. It is necessary to simulate the high enthalpy, high pressure, Mach number and the same concentration of oxygen species as air in hypersonic flight.

56. Polyethylene glycol ( PEG ) is a kind of phase change materials with high enthalpy and low thermal hysteresis.

57. Enthalpy vaporization of 104 organic compounds were estimated and compared with experimental data by the simulating estimation software and the total average error is just 0.864%.

58. To overcome defects of the calorimetric method and actual enthalpy drop method introduced is a concept of the apportionment according to quality of thermification power generation cold source loss.

59. After extending the cleaving-redeformation model for estimating the bond energies, a method for estimating the enthalpy changes of forming carbene has been put forward.

60. Estimations of the isosteric enthalpy of adsorption, free energy, and entropy of adsorption were reported and the adsorption behaviors were reasonably interpreted.

61. The effect of a solution heat exchanger on the enthalpy COP is also discussed.

62. And our heat of reaction or enthalpy of reaction is defined as the enthalpy at constant pressure.

63. Estimations of the isosteric enthalpy of adsorption, free energy, and entropy of adsorption are reported and, the adsorption behaviors are reasonably interpreted.

64. Calculate the thermal system with equivalent enthalpy reduction method according to the system's test data.

65. Based on an example, the feed-water enthalpy rise distribution for the domestic 200MW steam turbine regenerative system is discussed in this paper.