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  • Created by: Sopha8
  • Created on: 29-03-15 15:41
Define global warming. What are the 2 main greenhouse gasses?
enhancing the greenhouse effect causing the planet to warm up. CO2-increased due to industrial revolution and deforestation. Methane-increase due to burning fossil fuels,more cattle and permafrost melting
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Explain the effects of global warming on crops, insects and animals
crops-CO2 limiting factor so could increase. insects-affect life cycle, more abundant eg mosquitoes as thrive in warmer/wetter weather. animals-change distribution and abundance
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Draw a standard mechanism for a reaction with an acyl chloride and name the mechanism
:
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What are fats and oils?
fatty acids combines with glycerol by ester bond. saturated=fats as chains fit neatly increasing van der waals. unsatursated=oils, chains bent so cant get close therfore lower melting point
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What 2 things happen when a solid ionic lattice dissolves? how do you calculate enthalpy of solution?
1-bonds between ions break- lattice enthalpy of dissociation 2) bonds with water made-enthalpy of hydration. solution= lattice dissociation + hydration
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What are the drug therapies for stress?
Benzodiazepine-enhance GABA activity (binds to receptors opens chloride channel in neuron so preventing stimulation from other neurotrasmitters eg seratonin) Beta-blockers- block recpetors stimulated by adrenaline from sympathomedullary response
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Why are some batteries not rechargeable? how do reachargeable batteries work?
irreversible reaction as zinc anode forms casing so is used up in reaction therefore risk of expolsion/leak. current supplied to force electrons opposite way
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How do fuel cells work? what can they be used for?
chemicals stored outside cell are fed in. H-O fuel cell in electric cars, H fed to negative electrode H2--> 2H+ + 2e-, O fed to positive O2+4H+--> 2H2O
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Card 2

Front

Explain the effects of global warming on crops, insects and animals

Back

crops-CO2 limiting factor so could increase. insects-affect life cycle, more abundant eg mosquitoes as thrive in warmer/wetter weather. animals-change distribution and abundance

Card 3

Front

Draw a standard mechanism for a reaction with an acyl chloride and name the mechanism

Back

Preview of the front of card 3

Card 4

Front

What are fats and oils?

Back

Preview of the front of card 4

Card 5

Front

What 2 things happen when a solid ionic lattice dissolves? how do you calculate enthalpy of solution?

Back

Preview of the front of card 5
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