AQA A Level Chemistry复习笔记1.7.6 Catalysts
Maxwell-Boltzmann Distribution Curve - Catalyst Catalysis is the process in which the rate of a chemical reaction is increased, by adding a catalyst A catalyst increases the rate of a reacti...
AQA A Level Chemistry复习笔记1.7.5 Effect of Concentration & Pressure
Concentration, Pressure & Rate of Reaction Concentration The more concentrated a solution is, the greater the number of particles in a given volume of solvent An increase in concentratio...
AQA A Level Chemistry复习笔记1.7.4 Effect of Temperature on Reaction Rate
Temperature & Rate of Reaction Temperature & Rate of Reaction Increasing the temperature of the reaction mixture increases the rate of reaction in the following two ways: At higher t...
AQA A Level Chemistry复习笔记1.7.3 Maxwell–Boltzmann Distributions
Maxwell-Boltzmann Distribution Curve - Temperature Maxwell-Boltzmann distribution curve A Maxwell-Boltzmann distribution curve is a graph that shows the distribution of energies at a certain...
AQA A Level Chemistry复习笔记1.7.2 Measuring Rates of Reaction
Measuring the Rate of a Reaction Reaction rate The rate of reaction is the speed at which a chemical reaction takes place and has units mol dm-3 s-1 or mol dm-3 min-1 The rate of a reaction ...
AQA A Level Chemistry复习笔记1.6.7 Bond Enthalpies
Bond Enthalpies The amount of energy required to break one mole of a specific covalent bond in the gas phase is called the bond dissociation energy Bond dissociation energy (E) is usually ju...
AQA A Level Chemistry复习笔记1.6.6 Applications of Hess’s Law
Hess' Law Calculations You must make sure that you can apply Hess' Law effectively and calculate enthalpy changes in different situations Remember - it is the data that is important Check wh...
AQA A Level Chemistry复习笔记1.6.5 Hess' Law
Using Hess' Law Calculating ΔHr from ΔHf using Hess’s Law energy cycles The products can be directly formed from the elements = ΔH2 OR The products can be indirectly formed from the elements...
AQA A Level Chemistry复习笔记1.6.4 Calorimetry
Calorimetry Measuring enthalpy changes Calorimetry is the measurement enthalpy changes in chemical reactions A simple calorimeter can be made from a polystyrene drinking cup, a vacuum flask ...
