2023AP艺术史考试报名开启！社会考生如何报名？
9月19日，美国大学理事会College Board 宣布大陆2023年AP考试报名正式开启。 在2022-23学年，大学理事会继续与Prometric合作管理国内的AP考试报名和考务工作。 2022-23学年AP艺术史考试可以正式报名了！ AP艺术史...
Edexcel A Level Chemistry:复习笔记5.5.5 Continuous Monitoring Method
Continuous Monitoring Method Continuous monitoring involves collecting experimental data throughout the course of a reaction to plot a concentration-time graph Two of the most common ways to...
Edexcel A Level Chemistry:复习笔记5.5.4 Initial Rates Method
Initial Rates Methods The initial rates method determines the rate at the very start of the reaction when t = 0 The initial rate can be found by: Drawing a concentration-time graph Adding a ...
Edexcel A Level Chemistry:复习笔记5.5.3 Rates - Experimental Techniques
Rates - Experimental Techniques To measure the rate of a reaction, we need to be able to measure either how quickly the reactants are used up or how quickly the products are formed The metho...
Edexcel A Level Chemistry:复习笔记5.5.2 Rate Equations
Orders of Reaction The order of a reactant shows how the concentration of a chemical, typically a reactant, affects the rate of reaction It is the power to which the concentration of that re...
Edexcel A Level Chemistry:复习笔记5.5.1 Rates of Reaction
Rates of Reaction - Introduction The rate of reaction refers to the change in the amount or concentration of a reactant or product per unit time The units for rate of reaction are mol dm-3 s...
Edexcel A Level Chemistry:复习笔记5.4.4 Feasible Reactions
Feasible Reactions Graphing the Gibbs Equation The Gibbs equation can be expressed as the equation for a straight line ΔGꝋ = ΔHꝋ - TΔSꝋ ΔGꝋ = - ΔSꝋT + ΔHꝋ y = mx + c A graph of free energy ...
Edexcel A Level Chemistry:复习笔记5.4.3 Gibbs Free Energy
Feasibility of Reactions Gibbs free energy The feasibility of a reaction is determined by two factors The enthalpy and entropy change The two factors come together in a fundamental thermodyn...
Edexcel A Level Chemistry:复习笔记5.4.2 Entropy Calculations
Total Entropy Calculations If we take the reaction between sodium and chorine, we know that this is a very exothermic reaction and also involves a decrease in entropy as a solid is produced ...
四门AP物理学习内容有什么区别？应该如何选择？
作为AP科学类中的顶梁柱，AP物理可谓是撑起了科学类的半边天。但是新手小白在刚开始面对4门AP物理时总是傻傻分不清楚：这几门到底要学什么内容，彼此之间又有哪些异同？在选择的时候应该如何做好取舍呢？ AP物理...
Edexcel A Level Chemistry:复习笔记5.4.1 Introducing Entropy
Introducing Entropy You may have wondered why it is that endothermic reactions occur at all, after all, what can be the driving force behind endothermic reactions if the products end up in a...
Edexcel A Level Chemistry:复习笔记5.3.4 Enthalpy of Solution
Solution & Hydration Definitions Enthalpy of solution The standard enthalpy change of solution (ΔHsolꝋ) is the enthalpy change when 1 mole of an ionic substance dissolves in sufficient w...
