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Bonds Breaking
Needs energy in
(Activation energy)
Bonds Making
Gives energy
If more energy is need to break then
out make = endothermic
If more energy is in making rather than
breaking it is exothermic
http://www.bbc.co.uk/schools/gcsebitesize/science/add_aqa_pre_2011/chemreac/energychangesrev1.shtml
http://www.nationalstemcentre.org.uk/elibrary/resource/5515/how-science-works-clip-bank-energetic-
reactions
Animation of Exothermic reaction
http://www.footprints-science.co.uk/flash/activation2.swf
recall that exothermic reactions are accompanied by an increase in
temperature and endothermic reactions by a decrease in temperature
define an exothermic reaction as one in which heat energy is given out
and an endothermic reaction as one which heat energy is taken in and
give examples of such reactions
recall that the breaking of bonds is endothermic and that the making of
bonds is exothermic…read more

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http://www.epa.gov/apti/bces/module1/kinetics/animation/kani1/kani102.
htm
http://www.kscience.co.uk/animations/collision.htm
http://www.ewellcastle.co.uk/science/pages/kinetics.html
http://www.southaxholme.doncaster.sch.uk/subjects/animations/showcase%20page%206/collision%20theory.
swf
describe and explain the effect of changes in temperature,
concentration and surface area of a solid on a given rate of reaction Video on Collision Theory
http://www.bbc.co.
explain that reactions can occur when particles collide and uk/learningzone/clips/collisi
that increasing the frequency and energy of collisions on-theory-and-rates-of-
increases the rate of the reaction reaction/10668.html…read more

Slide 4

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Do own rates thio experiment
http://www.kscience.co.uk/animations/thio.swf
Data logging Animation
http://www.kscience.co.uk/animations/thio_ict.htm
describe experiments to investigate the effect of temperature,
concentration and surface area of a solid on the rate of a reaction Youtube video Experiment
(data-logging equipment may be used here) http://www.youtube.com/watch?v=CH8gH7xKCxQ…read more

Slide 5

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Digestive Enzyme Video
http://www.bbc.co.uk/learningzone/clips/digestive-enzymes/10649.
html
Use of Enzyme
http://www.bbc.co.
uk/schools/gcsebitesize/science/add_aqa_pre_2011/enzymes/enzymes_an
d_digestion4.shtml
http://www.teachersdomain.org/resource/biotpd.pd.sci.
provactivity/
Catalysts
http://www.bbc.co.
uk/schools/gcsebitesize/science/ocr_gateway_pre_2011/rocks_metals/7_fa
ster_slower5.shtml
recall that enzymes are biological catalysts and appreciate the
importance of controlling the speed of chemical reactions for the
maintenance of life
describe the effect of a catalyst on the rate of reaction, and
interpret the results…read more

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This sign means it is reversible reaction
and thus can go both ways
It is an exothermic reaction so if you have a low
temperature the system will try to raise the
temperature and thus make ammonia
Bitesize Haber Process
http://www.bbc.co.uk/schools/gcsebitesize/science/add_aqa_pre_2011/chemreac/energychangesrev2.shtml
Video of Haber Process
http://www.bbc.co.uk/learningzone/clips/formation-of-ammonia-in-the-haber-process/4432.html
4moles of gas goes to 2 moles of ammonia and
describe the conditions under which ammonia is produced from nitrogen thus if you increase the pressure the system
and hydrogen in the Haber process will make ammonia to reduce the pressure
demonstrate understanding that this reaction is reversible and can reach a
dynamic equilibrium
To improve the yield but keep
demonstrate understanding of how the position of a dynamic
equilibrium can be affected by changes of temperature and pressure, energy down the process uses
to include the Haber process as an example a catalyst
demonstrate understanding of the consequential effect of these
changes on the rate of attainment of equilibrium and the possible
need to use a catalyst…read more

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