A-level经济知识点讲解：国际收支的结构
作为管理、金融、会计学专业的基础，A-level经济一直是非常受欢迎的科目。众所周知A-level经济难度真的不小，今天我们就一起来看看国际收支的结构这个知识点。 国际收支平衡——国际收支的结构 对于许多Alevel学生...
IB DP Chemistry: HL复习笔记17.1.1 Applying the Equilibrium Law
Explaining Le Châtelier’s Principle Le Châtelier's principle Le Châtelier's principle says that if a change is made to a system at dynamic equilibrium, the position of the equilibrium moves to mini...
IB DP Chemistry: HL复习笔记16.2.3 Activation Energy from Rate Constants
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...
IB DP Chemistry: HL复习笔记16.2.2 Graphing the Arrhenius Equation
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...
IB DP Chemistry: HL复习笔记16.2.1 The Arrhenius Equation
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 ...
IB DP Chemistry: HL复习笔记16.1.5 Mechanism Problems
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...
IB DP Chemistry: HL复习笔记16.1.4 Rate Determining Step
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...
IB DP Chemistry: HL复习笔记16.1.3 Graphical Representations
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...
IB DP Chemistry: HL复习笔记16.1.2 Rate Constants
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...
