NSS官方发布2022年英国大学满意度调查结果！
近日全英学生调查 (NSS) 发布了2022年英国大学满意度调查结果，324329名学生参加了调查，英国每所大学都会参与NSS，还有一些学院和其他高等教育机构也参与其中。 英国学生办公室 (OfS) 表示，NSS收集学生对课程质...
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...
斯坦福大学：“硅谷的核心”
斯坦福大学——“硅谷的核心” 很难讲是斯坦福成就了硅谷，还是硅谷成就了斯坦福。毫无疑问，如果没有硅谷，斯坦福今天最多不过是一所二流偏上的大学，但是，没有斯坦福，硅谷恐怕难以支撑他们长达半个世纪的繁荣。 ...
IB DP Chemistry: HL复习笔记15.2.1 Entropy
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 stabl...
IB DP Chemistry: HL复习笔记15.1.5 Energy Changes in Aqueous Solutions
Measuring Energy Changes in the Lab Enthalpies of Solution Calorimetry can be used to find the energy change in chemical reactions. This is much easier to carry out in aqueous solutions We can take...
