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Infection and response
Organisation
Cell biology
Biological molecules
Homeostasis and response
Responding to change (a2 only)
Energy transfers (a2 only)
The control of gene expression (a-level only)
Substance exchange
Bioenergetics
Genetic information & variation
Inheritance, variation and evolution
Genetics & ecosystems (a2 only)
Ecology
Cells
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1f industrialisation and the people: britain, c1783-1885
1c the tudors: england, 1485-1603
Britain & the wider world: 1745 -1901
Inter-war germany
World war one
2n revolution and dictatorship: russia, 1917-1953
World war two & the holocaust
1l the quest for political stability: germany, 1871-1991
The cold war
2j america: a nation divided, c1845-1877
Medieval period: 1066 -1509
The fight for female suffrage
2m wars and welfare: britain in transition, 1906-1957
2d religious conflict and the church in england, c1529-c1570
Britain: 1509 -1745
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04/09/2022
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if a system is at equilibrium and a change is made to any of the conditions the system responds to counteract the change." (Le Chatelier's Principle). 7 equilibrium- when the forwards and reverse reactions occurat exactly the same rate. (sealed container). endothermic takes heat from the environment. exothermic releases heat to the environment concentration of reactants. → increased concentration = increased rate of reaction. = increased chance of collision. pressure of gases → increased -pressure - increased rate of reaction = increased chance of collisions (more particles) K surface area of solid reachants increased SA = increased rate of reaction → exposes more of the solid → greater chance of callisons. ← products canculso form the reachants. = catalyst reversible reactions increase in pressure = reaction favours side. with fewer number of molecules Pactors affecting route. H C6 Kate and Extent of Chemical change temperature increased temperature - increased rate of reaction. = increased speed of particles mores energetic collisions → increase rate of reaction kwersach vation energy decrease in pressure > reachion favours side with larger number of molecules less concentration. of a product = more products will be formed changing conditions at equilibrium. ✓ increase: → product increases for endothermic reactions more concentration of reachantant = more product. changing temperature ✓ → product decreases for exothermic reactions decrease → product decreases for endothermic reachons → product increases Per exothermic reactions.
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