IB DP Chemistry: HL复习笔记6.1.2 Rate of Reaction
Rate of Reaction Reaction rate Some reactions take place instantly, but most are much slower and it is possible to measure how long these reactions take to reach a certain stage As a chemical react...
IB DP Chemistry: HL复习笔记6.1.1 Collision Theory
Kinetic Theory The kinetic theory developed in the 18th century out of a need to explain how it is that gases exert pressure inside a container Theories about gas particles and movement were extend...
IB DP Chemistry: HL复习笔记5.3.4 Case Study: Ozone
Case study: Ozone & Bond Strength A study of bond enthalpy can explain why ozone and oxygen in the atmosphere play very different roles in the flow of energy These processes have a profound eff...
IB DP Chemistry: HL复习笔记5.3.3 Energy Profiles
Energy Profiles An energy profile or energy level diagram is a diagram that shows the energies of the reactants, the transition state(s) and the products of the reaction with time The transition st...
IB DP Chemistry: HL复习笔记5.3.2 Bond Enthalpy Calculations
Bond Enthalpy Calculations Bond energies are used to find the ΔHrꝋ of a reaction when this cannot be done experimentally The process is a step-by-step summation of the bond enthalpies of the all th...
AQA A Level Maths: Pure复习笔记2.9.1 Translations
Translations What are graph transformations? When you alter a function in certain ways, the effects on the graph of the function can be described by geometrical transformations With a transl...
IB DP Chemistry: HL复习笔记5.3.1 Bond Enthalpy
Bonds & Energy When bonds are broken or made enthalpy changes take place A chemical bond is a force of attraction between two atoms Breaking the bond requires the input of energy it is therefor...
IB DP Chemistry: HL复习笔记5.2.4 Using ∆Hf° to Find Enthalpy Changes
Using ∆Hf° to Find Enthalpy Changes Standard Enthalpy of Formation is defined as “The enthalpy change when one mole of a compound is formed from its elements under standard conditions” We can use e...
IB DP Chemistry: HL复习笔记5.2.3 Using Hess's Law - Equations
Hess's Law using Equations We can use Hess’s Law to solve unknown enthalpy changes by combining equations This requires a methodical step-by-step approach It is necessary to identify how the given ...
