What is the reaction of the aluminum thermal reaction? Is it an exhalation reaction?Aluminiothermic reaction was a kind of oxide-reduction reaction between aluminum and metal or non-metal compounds at high temperatures. Aluminiothermic reaction was an exhaling reaction, and its heat release was very large, usually enough to heat the product above the melting point, and the reaction could generally occur locally and be self-sustaining. This characteristic also reflected the energy-saving characteristics of the reaction.
<a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Which one is the heat absorbing reaction, the oxidization reaction or the reduction reaction?Oxidation and reduction reactions occurred simultaneously in a single oxido-reduction reaction. It could not simply be said that either of the reactions was heat absorbing. Oxidation-reduction reactions could be both heat absorbing and heat releasing. For example, the combustion reaction was an oxido-reduction reaction and was an exhalation reaction, while the formation of water gas was an absorption reaction.
<a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Distinguishing Fever Reaction and Hemolytic ReactionFever usually occurred within 1 - 2 hours after blood transfusion. It was often accompanied by chills or chills, followed by high fever. The body temperature could reach 39 - 40 ° C, accompanied by skin flushing and headache. Most of the blood pressure did not change. The symptoms lasted for less than 10 minutes and relieved after 1 - 2 hours. Some patients might be accompanied by nausea, vomiting and other symptoms. Most hemolytic reactions were caused by the transfusion of abnormal blood. The typical symptoms were shock, chills, high fever, difficulty breathing, back pain, precordium pressure, headache, hemoglobinuria, abnormal bleeding, and so on, which could lead to death. The only early signs of surgery patients under anesthesia were wound bleeding and low blood pressure. Compared to hemolytic reactions, fever reactions during blood transfusion were usually milder, but hemolytic reactions were more serious and even life-threatening. In addition, from the mechanism of the fever reaction, it was different from the hemolyzed reaction. The hemolyzed reaction was an acute immune transfusion reaction caused by the reaction of the transfused red blood cells (a few of which were the red blood cells of the recipient) with the corresponding red blood cell allo-antigen-like body of the recipient. In terms of treatment, there were also differences between the two. Blood transfusion should be stopped immediately for fevers, and heat preservation should be given when shivering, and fever should be treated with antipyretic treatment. For hemolytics, more complicated and urgent treatment measures should be carried out according to the specific situation, such as dealing with possible serious consequences such as shock and acute kidney failure.
<a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The Determination of Reaction Rate and Reaction ConstantThe chemical reaction rate represented the speed of the chemical reaction, which was the rate of change of the reaction progress with time or the reaction progress of the chemical reaction in unit time and unit volume. The average reaction rate was the decrease of the concentration of the reagent or the increase of the concentration of the product in unit time. The instantaneous reaction rate was the limit of the average reaction rate that approached zero. The reaction rate constant represented the chemical reaction rate at a unit concentration. It was independent of the concentration, but it was affected by factors such as temperature, catalyst, and solid surface properties. Usually, the larger the reaction rate constant, the faster the reaction would proceed.
There were two common methods to measure chemical reaction rates: chemical and physical methods. The chemical method used chemical analysis to directly measure the change in the concentration of the reagent or product over time to obtain the chemical reaction speed. However, the chemical analysis speed might not be able to keep up with the reaction speed and affect the measurement results. However, it could provide an absolute concentration value. The physical method was more extensive and convenient. It was to determine the reaction speed based on some physical properties that changed with the reaction, such as the pressure method, the distension meter method, or the volume method; the optical rotatory method, the interference method, the chromicity method, and the spectrophotosity method; and the electrical property method, such as the conductivity method, the potential method, the polarography method, the dielectrical constant method, and the mass spectrum method.
As for the determination of the reaction constant, for example, in the experiment of determining the rate constant of the fading reaction by the method of the catalyst, based on the principle of the catalyst kinetic method, the reaction system of the fading reaction of the Evans Blue by the reaction of the potassium bromate under the action of the NaNO3 was proposed. The corresponding chemical reaction rate constant was calculated by measuring the change of the absorption of the reaction system at different initial concentration and temperature. In terms of specific operations, the stock solution of the relevant reagents was first prepared, and then the reagents were added into the color-measuring tube according to a certain order and dosage. The timing and volume were started, and then the absorption curve was measured. The reaction constant was determined by preparing reaction solutions of different compositions, adding the solution after reacting for a period of time to stop the reaction, and taking a sample to measure the absorption curve. Finally, the concentration of other components was maintained at a constant temperature, and the change of the light absorption with time when different amounts of the solution of bromate or the solution of NaNO3 were measured, as well as the change of the light absorption with time when the specific amount of the solution of NaNO3 was measured at different temperatures.
<a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Planet VegetaPlanet Vegeta was a planet in Dragon Ball, formerly known as Planet Plante. Its initial inhabitants were the Zifru people, who loved peace and possessed highly developed technology.
The Saiyans 'true homeland was the planet Sarada. However, after the planet Sarada was destroyed due to civil strife, the Saiyans fled to Planet Prante under the leadership of King Vegeta. They were taken in by the Zifu people. However, the Zifu people were very unfriendly to the Saiyans and treated them like slaves. So on a full moon night, the Saiyans, led by King Vegeta, launched a counterattack against the Zifrans. After transforming into the giant apes, the Saiyans were very powerful, and the Zifrans were quickly destroyed. Planet Plante became the Saiyan's planet and was renamed Planet Vegeta.
This was the hometown of the Saiyans, and also the birthplace of Kakarot (Sun Wukong). Kakarot was sent to Earth by his father Badak as soon as he was born. He wanted him to destroy Earth when he grew up. After arriving on Earth, he was adopted by Sun Wufan and named Sun Wukong. In the end, Planet Vegeta was destroyed by Fliesa. In addition, Paragas was a Saiyan from Planet Vegeta and Broli's father. His identity on Planet Vegeta was that of a colonel.
<a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Is Vegeta a woman?In the original Dragon Ball, Vegeta was male, but in the Dragon Ball character gender conversion chapter, there were two female versions of the gentle girl Vegeta and the black-haired elder sister Vegeta, but this was a derivative creation.
<a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Reaction phenomenon of the reaction between the two substancesThe reaction of the two reagents would produce a light green deposit (nickelous carbonite) and then a solution of the two reagents. However, if the test tube was shaken, the deposit would dissolve, regardless of the amount of the reagent.
<a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Is water absorption a chemical reaction or a physical reactionWater absorption was usually a physical property that was reflected in physical changes, but some also involved chemical changes. For example, the solid state of soda ash had a strong moisture absorption. It absorbed the surrounding water vapor and dissolved in the absorbed water, forming a concentrated solution of soda ash. This process was a physical change. The concentrated sulfuric acid could absorb the water vapor in the air around it to form a series of water compounds. On the other hand, the concentrated sulfuric acid dissolved in the absorbed water to make itself thinner, which also involved physical changes. However, the concentrated sulfuric acid absorbed the first water molecules in the copper sulfuric acid, which reflected the water absorption (physical property), and the removal of the remaining four water molecules reflected the dehydration (chemical property). The main component of the quicklime drying agent was lime, and its water absorption ability was achieved through a chemical reaction. This water absorption was irreversible.
<a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>