Explaining Le Chatelier’s Principle Le Chatelier's principle Le Chatelier's principle says that if a change is made to a system at?dynamic equilibrium, the position of the equilibrium moves to mini...
近日，英國《衛報》報道，由于AQA考試局宣布72小時罷工，今年夏天的GCSE 和 A - level 考試分數或將推遲發布。這對中國的國際學?？忌泻斡绊?？ 考試局罷工，大考成績延遲發布？ 據《衛報》報道，AQA考試委員會...
Activation Energy from Rate Constants at Different Temperatures Arrhenius Plots Arrhenius plots for two reactions with different activation energies can be drawn on the same graph Arrhenius plots f...
Graphing the Arrhenius Equation Finding the Activation Energy Very often, the Arrhenius equation is used to calculate the activation energy of a reaction A question will either give sufficient info...
The Arrhenius Equation The rate equation shows how each of the reactants in a reaction effects the rate of the reaction and it includes the rate constant,?k However,?k?only remains constant if the ...
Mechanism Problems Chemical kinetics can only?suggest?a reaction mechanism, they cannot prove it However, they can be used to disprove a proposed mechanism Elementary steps are the steps involved i...
近日全英學生調查 (NSS) 發布了2022年英國大學滿意度調查結果，324329名學生參加了調查，英國每所大學都會參與NSS，還有一些學院和其他高等教育機構也參與其中。 英國學生辦公室 (OfS) 表示，NSS收集學生對課程質...
Molecularity & Rate Determining Step Rate-determining step & intermediates A chemical reaction can only go as fast as the slowest part of the reaction So, the?rate-determining step?is the s...
Graphical Representations of Reaction Order Reaction Order Using Concentration-Time Graphs In a?zero-order?reaction, the concentration of the reactant is inversely proportional to time This means t...
Rate Constants The?rate constant, (k), of a reaction can be calculated using the initial rates and the rate equation Calculating the rate constant from the initial rate The reaction of sodium carbo...
Rate Equations The??rate of reaction?can be found by: Measuring the decrease in the concentration of a reactant over time Measuring the increase in the concentration of a product over time The unit...
Free Energy & Equilibrium When ΔG?< 0 for a reaction at constant temperature and pressure, the reaction is spontaneous When a reversible reaction reaches equilibrium, the Gibbs free energy i...
