【Q&A Question 091】2018.04.01
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This post was last edited by liuquan1100 on 2018-4-1 10:51. [Q&A Question No. 091] 2018.04.01: What are the characteristics of catalysts during reactions? (1) The catalyst reacts with the reactants to form intermediate compounds, thereby altering the reaction pathway ； (2) The role of the catalyst is to shorten the time required to reach equilibrium, but it cannot change the equilibrium state ； (3) The catalyst is selective. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) Due to the limitations on the number of posts in the “One Question per Day” section, “One Image per Day” posts have been moved to the registered devices section; you can access them through the directory I posted. For management purposes, if you need to access content from a few days ago, please go to the following thread to enter the “My Registration Season” event – (Note: This event is currently ongoing in the Chemical Engineering section) https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1897835. There is also a thread with daily questions related to chemical engineering technology training in 2018: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1888971. Another thread contains daily images related to registered equipment in 2018: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1888970. A thread with Q&A questions related to hydrogen production and hydrogenation technologies in 2018 can be found here: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1888968. There is also a thread with daily questions related to LNG technology in 2018: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1888973. Threads with Q&A questions from 2017 are available here (updates have started): https://bbs.hcbbs.com/thread-1657793-1-1.html. Threads with daily questions from 2017 are also available here (updates have started): https://bbs.hcbbs.com/thread-1657794-1-1.html. A thread with daily images from 2017 can be found here: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1875160. A list of daily questions related to LNG technology in 2017 is available here: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1804162. Threads with Q&A questions from 2016 are available here (all updates have been completed): https://bbs.hcbbs.com/thread-1597792-1-1.html
Answer: (1) The catalyst reacts with the reactants to form intermediate compounds, thereby altering the reaction pathway； (2) The role of the catalyst is to shorten the time required to reach equilibrium, but it cannot change the equilibrium state ； (3) The catalyst is selective.
Catalysts alter the pathway of chemical reactions, reduce the activation energy required for these reactions, thereby making it easier for reactant molecules to reach an activated state and proceed with the reaction, **which in turn lowers the temperature needed for the reaction to occur.**
1. Catalysts are selective； 2. The catalyst reacts with the reactants to form intermediate compounds, thereby altering the reaction pathway ； 3. A catalyst can shorten the time required to reach equilibrium, but it cannot change the equilibrium state.
(1) The catalyst reacts with the reactants to form intermediate compounds, thereby altering the reaction pathway； (2) The role of the catalyst is to shorten the time required to reach equilibrium, but it cannot change the equilibrium state ； (3) The catalyst exhibits selectivity
Answer: (1) The catalyst reacts with the reactants to form intermediate compounds, thereby altering the reaction pathway； (2) The role of the catalyst is to shorten the time required to reach equilibrium, but it cannot change the equilibrium state ； (3) The catalyst is selective.
The role of a catalyst in chemical reactions is to alter the rate of those reactions, without its own mass or chemical properties changing.
The role of a catalyst in chemical reactions is to alter the rate of those reactions, without its own mass or chemical properties changing.
The role of a catalyst in chemical reactions is to alter the rate of those reactions, without its own mass or chemical properties changing
What are the characteristics of catalysts during a reaction? The catalyst itself participates in the reaction; its mass remains unchanged and its composition does not change before and after the reaction. Catalysts can alter the rate of chemical reactions; those that increase the reaction rate are called catalysts, while those that decrease it are called inhibitors.