What does the spontaneous reaction formula of matter mean?
The spontaneous reaction of matter is expressed as {Delta G}={Delta H}-{Delta S}.
Delta G represents the Gibbs free energy change, which is a key indicator to determine whether the reaction can proceed spontaneously. If the reaction can proceed spontaneously, the reaction cannot proceed spontaneously, and the reverse reaction can proceed spontaneously if the reaction is not. When the reaction reaches equilibrium, the reaction reaches equilibrium.
Reverse spontaneous reaction conditions
For a chemical reaction, one could judge the spontaneous nature of the reaction by the Gibbs free energy (? G=? H-T? S). When AG>0, the reaction proceeded spontaneously in reverse. 1. ** Analysis from the perspective of the change in the change in the temperature (? H) and the change in the temperature (? S)** - When a reaction that absorbs heat (Delta H>0) and reduces the entropies (Delta S<0), it must be a non-spontaneous reaction (forward), which is a reverse spontaneous reaction, because according to Delta G= Delta H-T Delta S, in this case, Delta G must be greater than 0. - For the reaction of decreasing entropies (? S<0) with an exothermic reaction (? H<0), increasing the temperature will make the reaction reverse spontaneously, because it is necessary to ensure that? G>0 (from? G=? H-T? S, when? H<0,? S<0, increasing T will increase? G and make it greater than 0). - For a reaction with an increase in entropies (? S>0) that is an encircling heat (? H>0), lowering the temperature will make the reaction reverse spontaneously, because it is necessary to ensure that? G>0 (from? G=? H-T? S, when? H>0,? S>0, a decrease in T will increase? G and make it greater than 0). 2. ** Analysis from the perspective of equilibrium constant (for a irreversible reaction)** - If the equilibrium constant of a reaction is K, when the reaction quotient J>K, the reaction will proceed spontaneously in the opposite direction. The equilibrium constant K is related to the standard mole Gibbs free energy change of the reaction, which can be calculated by the formula, where R is the gas constant and T is the temperature. The expression of the reaction quotient J is similar to the equilibrium constant K, except that the concentration or partial pressure is the actual value of the reaction at a certain time. When J>K, the reaction proceeded spontaneously in the opposite direction according to the equation: <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
g greater than 0 is a spontaneous reaction
According to the Gibbs free energy criterion, the reaction can proceed spontaneously if G<0, but not if G<0. Therefore, the reaction is not spontaneous when G>0. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Reaction Formula and Phenomenon of the Reaction of the Reaction
The reaction equation is: 2NaHSO2 + 2CH CH2Ox = Na SO2 +H SO2 + 2CH CH2Ox. The phenomenon of this reaction was not mentioned in the information provided, so it was impossible to give an accurate answer. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What does the reaction formula for preparing fruit vinegar mean?
In the process of preparing fruit vinegar, there were two corresponding reactions. When oxygen and sugar were sufficient, the vinegar bacteria would break down the sugar in the grape juice into vinegar. Although the reaction formula for this process did not give a specific formula, the principle was that the vinegar bacteria used sugar to synthesize vinegar. When sugar is lacking, the reaction is This reaction formula indicates that the acetoid acid bacteria can convert the alcohol into alcohol when there is insufficient oxygen and sugar source. The first step was to convert the reagent from (<anno data-annotation-id ="0000000 - 4110 - 4000 - 4000 - 8000 - 80000000000"> C </anno> H <anno data-annotation-id ="0000000 - 4000 - 4000 - 8000 - 80000000000"> Ox </anno>) to jumped from the reagent to the reagent, and then the reagent from the reagent to the reagent, and at the same time, water was formed. This process reflected the material transformation relationship in the process of fermentation under specific conditions, namely the conversion process from alcohol to the reagent. This conversion process required the participation of oxygen and was the result of the metabolism of the vinegar bacteria. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Reaction Rate Formula
1. For a chemical reaction, the reaction rate was calculated as: <<v>=<cC>(g)>+<dD>(g)>(v =<Delta c>/<Delta t>)(<v>: average rate,<<Delta c>>: concentration change,<<Delta t>>: time), in units of </(L·s)>. 2. For elementary reactions, the expression of the mass action law can be used as the reaction rate equation, the reaction rate equation, r = k(A)^a(B)^b, where k is the specific reaction constant (a quantity independent of concentration). 3. For the reaction,<aA(g)+bB(g)=cC(g)>, the reaction rate <v_positive = k_positive c^a(A)·c^b(B)>,<v_inverse = k_inverse c^c(C)>, when the reaction reaches equilibrium,<v_positive = v_inverse>, that is,<k_positive c^a(A)·c^b(B)=k_inverse c^c(C)>. 4. When the same reaction was expressed by different substances, the values might be different, but the meaning was the same. The reaction rates expressed by different substances had the relationship of [v(A): v(B): v(C): v(D)=m: n: c: d](the ratio of the rates was equal to the ratio of the measurement factors of the corresponding substances). <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What does spontaneous action mean?
Self-motivation refers to a situation that occurs naturally without being affected by external forces. As opposed to " self-awareness," it is an activity that people do not know or master objective laws. For example, in the absence of external coercion or guidance, the family committee decided to buy paint to renovate the classroom and let the parents share the cost, the villagers decided to collect fees from the people who went into the mountains to dig wild vegetables, and the animals interacted with the staff without any external special guidance.
Reaction Formula and Condition of the Reaction of the Acid and the Acid
Under normal circumstances, the reaction between the two could not be carried out directly. Because the lone pair of electrons of the oxygen of the alcoholic group was coupled with the aromatic ring, the reaction activity was very weak, and it could not be used to catalyze the ester reaction with the acid. To synthesize the ester, the reaction of an acid acid or an acid ether with the ether was usually done. For example, the reaction between the ether and the ether was: C6H50H +(CH3CO) 2O = CH3COOC6H5 + CH3COON. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Reaction Formula for the Production of Water by Water Reaction
以下是几种水解制氢的反应式： 1. 铝水反应制氢： - \(2Al +4H_{2}O = 2AlO(OH)+3H_{2}\uparrow\) - \(2Al + 6H_{2}O=2Al(OH)_{3}+3H_{2}\uparrow\) 2. 硼氢化钠催化水解制氢：\(NaBH_{4}+2H_{2}O\stackrel{催化剂}{=\!=\!=}4H_{2}+NaBO_{2}\) <a href="/?from=ask_words" style="color:red" target="_blank">点击前往免费阅读更多精彩小说</a>
First Order Reaction Formula of the Reaction Rate
The first-order reaction rate equation was: r = -dt/dt = kc, and its integral form was: Where, a is the concentration of the reagent at the beginning of the reaction, c is the concentration of the reagent at time t, and k is the rate constant. The unit is the negative power of the time unit, such as s^{-1}, min^{-1}, h^{-1}, d^{-1}, etc. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Reaction Formula of Substitution Reaction for the addition reaction of organic substances
Additional reaction: - The addition reaction of ethene and Bromine: <<CH2 = CH2 + Br2> - The addition reaction of ethene and hydrogen bromidate was as follows: <CH2 = CH2> - Under certain conditions, addition reactions could also occur between ethene, hydrogen, and water. Since the chemical properties of ethyne (carbon-carbon triple bond) were similar to that of alkene (carbon-carbon double bond), similar addition reactions could also occur. - The aromatic ring can undergo an addition reaction with hydrogen (in the presence of a catalyst such as Ni). - Aldol groups can undergo a reduction reaction (addition reaction), such as: <anno data-annotation-id ="00000000 - 4c00 - 4c00 - 8c00 - 9c00 - 9c000b000000"> CH3CH20H </anno>. Substitution reaction: - The substitution reaction between methane and Cl2: CH4 + Cl2. - The substitution reaction of the aromatic ring: For example, the substitution reaction with the aromatic group using FeBr3 as a catalyst; the nitration reaction with the aromatic group using concentrated sulfuric acid under heating conditions (the hydrogen on the aromatic ring is replaced by the nitrogen group). - The substitution reaction of the halated carbon was as follows: <<CH3CH2Br2>+<NaBr2>>. - The substitution reaction of alcohol: <CH3CH20H>+<br>> longrightarrow <CH3CH2br>+<H2O>> - The ester's cleavage reaction (which can be seen as a substitution reaction):<CH3COOCH2CH3 + H2O> <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>