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Physical Chemistry - Coggle Diagram
Physical Chemistry
Energetics
Exothermic reactions
Examples
Displacement reactions
Combustion reactions
Neutralisation reactions
Energy needed to break bonsd
Negative energy change
Endothermic reactions
Examples
Displacement reactions
Energy is released when making bonds
Positive energy chnage
Calirometery
Experiment
polystyrene drinking cup
vacuum flask
metal can
Some heat can be lost:
1.to surroundings
2.Absorbed by calorimeter
Calculations
Energy transfer in calorimeter
Specific heat capacity
the energy needed to raise the temperature of 1 g of a substance by 1 K
Molar enthalpy change
molar enthalpy change = heat change for the reaction ÷ number of moles
Energy change=Energy taken in-energy given out
Diagrams
Rates of Reactions
Temperature
High temperature high rate of reactions
low temperature low rate of reaction
Concentration
High Concentration high rate of reaction
Low concentration low rate of reactions
Surface area
High surface area high rate of reactions
Low surface area low rate of reactions
Catalyst
Faster when there is catalyst
Slower when there is no catalyst
