AQA A Level Chemistry复习笔记5.2.2 Deriving Rate Equations
Deducing Orders Order of reaction For the general reaction A + B → C + D The order of reaction shows how the concentration of a reactant affects the rate of reaction Rate = k [A]m [B]n When ...
2022年夏季A-Level&GCSE成绩公布时间已确认！三大考试局秋季考试具体安排公布
2022年夏季大考，CAIE、爱德思、牛津AQA成绩何时放榜？ CAIE考试局 2022年8月11日：AS&A Level成绩公布 2022年8月17日：Pre-U成绩公布 2022年8月18日：IGCSE和O Level成绩公布 爱德思考试局 2022.8.18：IAS&a...
AQA A Level Chemistry复习笔记5.1.8 Reaction Feasibility
Reaction Feasibility The Gibbs equation can be used to calculate whether a reaction is feasible or not ΔGꝋ = ΔHreactionꝋ - TΔSsystemꝋ When ΔGꝋ is negative, the reaction is feasible and likel...
AQA A Level Chemistry复习笔记5.1.7 Gibbs Free Energy
Gibbs Free Energy Gibbs free energy As we have seen in the previous sections, the feasibility of a reaction is determined by two factors, the enthalpy change and the entropy change The two f...
AQA A Level Chemistry复习笔记5.1.6 Entropy
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 less stable...
AQA A Level Chemistry复习笔记5.1.5 Enthalpy of Solution & Hydration
Solution & Hydration Enthalpy of solution The standard enthalpy change of solution (ΔHsolꝋ) is the enthalpy change when 1 mole of an ionic substance dissolves in sufficient water to form...
AQA A Level Chemistry复习笔记5.1.4 Comparing Lattice Enthalpies
Comparing Lattice Enthalpies How accurate are lattice enthalpies? It is possible to calculate a theoretical value for the lattice enthalpy of an ionic solid. To do this you need to know the ...
AQA A Level Chemistry复习笔记5.1.3 Born-Haber Calculations
Calculations Using Born-Haber Cycles Once a Born-Haber cycle has been constructed, it is possible to calculate the lattice energy (ΔHlattꝋ) by applying Hess’s law and rearranging: ΔHfꝋ = ΔHa...
AQA A Level Chemistry复习笔记5.1.2 Born-Haber Cycles
Constructing Born-Haber Cycles A Born-Haber cycle is a specific application of Hess's Law for ionic compounds and enable us to calculate lattice enthalpy which cannot be found by experiment ...
