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Anonymous users2024-02-07Chemical reaction kinetics is a matter of studying the speed of a chemical reaction, and it is impossible to judge the equilibrium state of the reaction. Determining the direction and limits of a chemical reaction requires a thermodynamic solution. Knowing the free energy function of two reactions is also not possible to judge whether it is easy to proceed or not.
If we know the standard Moore reaction Gibbs function of two reactions, we can know the degree of reaction when they reach equilibrium; Combined with the Molar reaction Gibbs function of the two reactions, the isothermal equation is used to determine whether the reaction is easy or not.
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Anonymous users2024-02-06Temperature, pressure, concentration of reactants, these are external factors. The main thing, of course, is the internal cause, that is, the nature of the substance itself.
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Anonymous users2024-02-051. It can be used as a marker under any circumstances: (1) v positive = v inverse (the same substance) (2) the content of each component (percentage content, quantity and mass of the substance) does not change with time (3) the consumption (generation) rate of a reactant: the consumption (generation) rate of a product = the ratio of stoichiometric numbers 2. It can be used as a marker under certain conditions
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Anonymous users2024-02-041. It can be used as a sign in any case
1) v positive = v inverse (same substance).
2) The content of each component (percentage content, quantity and mass of substance) does not change with time.
3) The consumption (generation) rate of a reactant: the consumption (generation) rate of a certain product = the ratio of stoichiometric numbers.
2. It can be used as a sign under certain conditions
1) For the reversible reaction system in which the colored substance participates or is generated, the color does not change.
2) For the reversible reaction system with the participation or generation of gaseous substances, if the change in the amount of gas substances before and after the reaction is not 0, the average relative molecular weight m of the mixed gas and the total reaction pressure p remain unchanged (constant temperature and constant volume).
3) For the constant capacitance insulation system, the temperature of the system does not change.
3. It cannot be used as a judgment mark:
1) The ratio of the change in the amount or concentration of the substance or the reaction rate of each substance = the ratio of the stoichiometric number (applicable in any case).
2) For the reaction of the whole gas, if the volume of the gas before and after the reaction does not change, the average relative molecular mass m of the mixed gas and the total reaction pressure p remain unchanged (constant temperature and constant volume).
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Anonymous users2024-02-03The concentration of the product is measured, and if it does not increase over time, the reaction reaches its limit.
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Anonymous users2024-02-02Reaching the limit is to reach the equilibrium, and when the rate of the positive and negative reactions is equal, the limit is reached.
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Anonymous users2024-02-01The limit of chemical reaction is the study of the maximum degree that a reversible reaction can achieve under certain conditions, that is, the dynamic equilibrium of chemical reactions. Raising the response limit depends on the specific response, and it is hoped that it will be adopted.
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Anonymous users2024-01-31The chemical reaction limit is the maximum degree that can be achieved by studying a reversible reaction, that is, the dynamic equilibrium of a chemical reaction.
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Anonymous users2024-01-30Maximizing the response rate means that a complete response should be.
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Anonymous users2024-01-29The limit of a chemical reaction is the maximum amount that a reaction can take
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Anonymous users2024-01-28There are many things that limit chemical reactions, the main ones are: Temperature, pressure, concentration, no catalytic techniques are too much.
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Anonymous users2024-01-27The chemical equilibrium is reached, and the conversion rate and yield are maximum, that is, the maximum reversible reaction is reached under the conditions of this reaction.
When the conditions of a chemical reaction are changed, the rate of chemical reaction is changed, which may lead to a change in the chemical equilibrium, and the limits of the chemical reaction are changed.
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Anonymous users2024-01-26Temperature, pressure, concentration of reactants, these are external factors. The main thing, of course, is the internal cause, that is, the nature of the substance itself.
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Anonymous users2024-01-25Temperature, pressure, concentration of reactants.
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Anonymous users2024-01-24Temperature, pressure, concentration of reflectants, and most importantly, the properties of the substance itself.
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Anonymous users2024-01-23, reaction substances (such as the limits of the reaction between HCI and Zn Fe are different), temperature, contact area of the substance (such as iron and iron powder), pressure, and concentration of reflectants, about these are a few.
1) Yes, as long as it is the substance in the equation.
2) The reaction rate ratio of O2 and SO2 is 11:8, so when the rate of SO2 generation is, the rate of O2 consumption is. >>>More
According to the principle of conservation of mass, the mass of a substance before and after the reaction must be equal, and whether a substance has a chemical reaction cannot be judged according to whether the mass is equal or not. >>>More
Esterification reaction is a class of organic chemical reactions, which is the reaction of alcohol with carboxylic acid or oxygenated inorganic acid to produce ester and water. It is divided into two categories: carboxylic acid reaction with alcohol and inorganic oxygenated acid reaction with alcohol, and inorganic strong acid reaction with alcohol. The esterification reaction of carboxylic acid and alcohol is reversible, and the reaction is generally very slow, so concentrated sulfuric acid is often used as a catalyst. >>>More
Generally speaking, the higher the temperature, the faster the reaction, the lower the temperature, the slower the reaction, which is not only a familiar phenomenon for chemists, but also a common sense of people's life, the room temperature is high in summer, and the food is easy to rot and deteriorate, but the food in the refrigerator can be stored for a longer time. The oxidation reaction rate of steel at room temperature is extremely slow, which is greatly accelerated with the increase of temperature, and a large amount of iron oxide scale has been produced when it is red-hot. The reaction of hydrogen and oxidation to form water can not be detected for several years at room temperature, and if it is heated to 973K, it will be completed instantaneously at the rate of **. >>>More
At the time of baking, milk carton baking powder is mixed with flour, or vinegar and baking soda are mixed, and then the "volcanic effect" occurs, and the process undergoes a double displacement or metathesis reaction. The reaction process between vinegar and baking soda is roughly as follows: HC2H3O2(AQ) +NaHCO3(AQ) NAC2H3O2(AQ) +H2O(AQ) +CO2(G).