Cho em hỏi STP là điều kiện tiêu chuẩn đúng ko
Mọi người có thể cho em biết cái từ “cơ chế phản ứng” của tiếng Anh là thế nào không.
mechanism = cơ chế pư đó bạn
Hi Dung, Cơ chế phản ứng dịch sang tiếng Anh là Reaction mechanism. Bạn tham khảo thêm tại đây:
In chemistry, a reaction mechanism is the step by step sequence of elementary reactions by which overall chemical change occurs.
Although only the net chemical change is directly observable for most chemical reactions, experiments can often be designed that suggest the possible sequence of steps in a reaction mechanism.
A mechanism describes in detail exactly what takes place at each stage of a chemical transformation. It describes the transition state and which bonds are broken, and in what order, which bonds are formed and in what order, and what the relative rates of the steps are. A complete mechanism must also account for all reactants used, the function of a catalyst, stereochemistry, all products formed and the amount each.
A reaction mechanism must also account for the order in which molecules react. Often what appears to be a single step conversion is in fact a multistep reaction. Consider the following example:
CO + NO2 → CO2 + NO In this reaction, it has been experimentally determined that this reaction takes place according to the rate law R = k[NO2]2. Therefore, a possible mechanism by which this reaction takes place is:
2 NO2 → NO3 + NO (slow)
NO3 + CO → NO2 + CO2 (fast)
Each step is called an elementary step, and each has its own rate law and molecularity. All of the elementary steps must add up to the original reaction. There are four types of elementary steps: 1) Addition, 2) Elimination, 3) Substitution and 4) Rearrangement.
When determining the overall rate law for a reaction, the slow step is the step that determines the reaction rate. Because the first step is the slow step, it is the rate-determining step. Because it involves the collision of 2 NO2 molecules, it is a bimolecular reaction with a rate law of R = k[NO2]2. If one were to cancel out all the molecules that appear on both sides of the reaction, you would be left with the original reaction.
In organic chemistry one of the first reaction mechanisms proposed was that for the benzoin condensation in 1903 by A. J. Lapworth.
Nguồn: Reaction mechanism - Wikipedia
Thân.
hi ! mình cũng đang cần học tiếng anh chuyên nghành hoá học. nghe nói "giáo trình tiếng anh dành cho sinh viên nghành công nghệ hoá " trường bách khoa hà nội khoa công nghệ hoá học ai có cuốn này hoặc tương tự có thể post lên cho mình? thank