AQA A Level Chemistry復習筆記1.8.2 Le Chatelier's principle
Le Chatelier's Principle Position of the equilibrium The?position of the equilibrium?refers to the relative amounts of products and reactants in an equilibrium mixture When the position of e...
AQA A Level Chemistry復習筆記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復習筆記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復習筆記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復習筆記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復習筆記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復習筆記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復習筆記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復習筆記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復習筆記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?...
AQA A Level Chemistry復習筆記1.6.3 Enthalpy Changes
Enthalpy Changes The total chemical energy inside a substance is called the?enthalpy?(or heat content) When chemical reactions take place, changes in chemical energy take place and therefore...
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