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...
IB DP Chemistry: HL复习笔记16.1.1 Rate Equations
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...
IB DP Chemistry: HL复习笔记15.2.5 Free Energy & Equilibrium
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...
IB DP Chemistry: HL复习笔记15.2.4 Spontaneous Reactions
Spontaneous Reactions Gibbs free energy provides an effective way of focusing on a reaction system at constant temperature and pressure to determine its spontaneity For a reaction to be spontaneous...
IB DP Chemistry: HL复习笔记15.2.3 Gibbs Free Energy
Gibbs Free Energy Change Gibbs free energy The feasibility of a reaction is determined by two factors, the enthalpy change and the [popover id="F7rfknVfbfcSJVkN" label='entropy change'] The two fa...
IB DP Chemistry: HL复习笔记15.2.2 Calculating Entropy Change
Calculating Standard Entropy Change The standard molar enthalpy values, Sꝋ, relate to standard conditions of temperature and pressure The entropy change, ΔSꝋ, can be calculated from thermodynamic d...
