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1 How is it possible for endothermic processes to occur spontaneously, and will a given reaction occur spontaneously?

2 Selectcracking is a highly endothermic reaction process.

3 The decomposition reaction is endothermic reaction for the ground state of hydrazine, but it is exothermic reaction for the first excited singlet state of hydrazine.

4 Results show that the adsorption is an endothermic reaction, which ion exchange is responsible largely for the removal of phosphate.

5 A new catalytic distillation process for the endothermic reaction of the dehydrogenation of isopropanol is developed in this work.

6 The absorption process is a spontaneous endothermic reaction. Accordingly, adequate drop of bed temperature is helpful for the absorption.

7 In the temperature span of the endothermic peak of the DSC heating curve,(www.Sentencedict.com) the average transformation rate is relatively large.

8 The results show that the transesterification is an endothermic reaction and higher temperature is favorable for the synthesis of diphenyl carbonate(DPC).

9 Presently, inorganic hot-pipe endothermic heat is the most advanced afterheat utilization technology all over the world.

10 The pyrolysis reaction an endothermic reaction and yields flammable gases, while the fuel oxidation is exothermic.

11 This process is endothermic with rapid carbon deposition and deactivation of the catalyst.

12 Moreover, K_(4D) increase along with the increases of temperature and molecular pressure (endothermic reaction).

13 At very high temperatures, more endothermic reactions play a role.

14 The adsorption of NP10EO, which is an endothermic process, has a low energy of activation, and is mainly a physical adsorption process.

15 Both of endothermic pyrolysis and exothermic oxidation occurred in smoldering material during the heated process.

16 The enthalpy-change coating consists of some matters as a base material causing endothermic reaction at a certain temperature range, which acts as iron chill when placed on a mold or core surface.

17 Besides these, the present calculations indicate that the epoxidation of ethylene is slightly endothermic or exothermic in sextet and quartet states, respectively.

18 The adsorption of cationic pink FG and methylene blue onto purified palygorskite is an endothermic processes, and direct acid proof scarlet 4BS is exothermic in nature.

19 Further thermodynamic investigations suggested that the adsorption of Sb on IOCS was spontaneous and endothermic.

20 A layer of nickel catalyst was provided to promote the endothermic reaction of steam and methane.

21 A saturated solution of sodium bicarbonate ( 13 L ) was added in portions ( endothermic, gas evolution ).

22 DSC analysis of every blend sample showed a large and broad endothermic peak around 150 ℃.

23 Unreacted calcium oxide or calcium carbonate generates sufficient heat to the endothermic reaction between calcium fluoride and sulfuric acid so that no external heat is needed.

24 New evidence appears to confirm that the ancient creatures were endothermic, or warm-blooded, like their modern descendants - birds.

25 A set of conduction type high temperature calorimetric system for measurement of heat sink of endothermic fuels has been developed.

26 Hexanediol is a waxy solid or flake. When formulated with water, the reaction is endothermic and one might need to warm the solution to effect complete dissolution at high levels of supersaturation.

27 Is Hell exothermic ( gives off heat ) or endothermic ( absorbs heat )?

28 Thermal analysis implies that the bauxite samples are of 2 obvious endothermic peaks, which are gibbsite and diaspore endothermic peak.

29 A bottom layer of nickel catalyst was provided to promote the endothermic reaction of steam and methane.

30 The excellent effect of the thermal insulation and fire resistant of the composites was mainly attributed to endothermic reaction.