This is where catalysts come into play. They serve to reduce the activation energy required for a reaction and thus increase the reaction rate giving us more products in a shorter period of time than would be possible int eh absence of the catalyst. In biology, the primary catalysts are ...
apeople come from 正在翻译,请等待...[translate] aMenneking 开始[translate] aa catalyst is a substance that increases the rate of a chemical reaction without itself being used up 催化剂是增加一个化学反应的率,不用用完的本身的物质[translate]...
The term 'catalyst' is used to describe a substance that ___ in a chemical reaction. A. increases the rate B. decreases the rate C. changes the products D. is consumed completely 相关知识点: 试题来源: 解析 A。催化剂(catalyst)的作用是提高化学反应的速率,而自身在反应前后质量和化学性质不...
A substance that speeds up a chemical reaction without being consumed is called___. A. reactant B. product C. catalyst D. solute 相关知识点: 试题来源: 解析 C。解析:加快化学反应但自身不被消耗的物质叫催化剂。选项 A 反应物会被消耗;选项 B 产物是反应生成的;选项 D 溶质不是起这个作用。反...
Energy is added to break bonds, and energy is released when bonds form. What is bond energy? Bond energy is the amount of energy that will break a bond between two atoms Describe two functions of a catalyst in a chemical reactions When a catalyst is present, less energy is needed and th...
A catalyst is a substance that increases the rate of a chemical reaction. Catalysts speed up the time taken to reach equilibrium,but they have no effect on the position of equilibrium once this is reached. This is because they increase the rate of the forward and reverse reactions equally. ...
The buzz from the 2008 Asia Petrochemical Industry Conference (APIC) in Singapore last week was on the massive capacity additions in China and the Middle East coming on from late 2008 through 2012.ICIS chemical business GroupICIS chemical business...
When investigating the impact of catalyst on a chemical reaction, which factor needs to be controlled? A. Reaction time B. Pressure C. Concentration of products D. Temperature 相关知识点: 试题来源: 解析 D。在探究催化剂对化学反应的影响时,温度需要被控制,以准确评估催化剂的作用。A 选项反应时间...
A catalyst is by definition a substance that increases the rate of approach to equilibrium of a chemical reaction in the reaction.A.without being substantially consumedB.not at all comsumedC.with decreasing significantlyD.with the change of it ’ s compo
aThe gross physical form of a catalyst is chosen to conform to the type of process to be used. The chemical and catalytic characteristics are chosen to achieve the desired reaction and, as an important corollary, to avoid undesired reactions. 催化剂的总外形被选择依照将使用的过程的种类。 化学...