GCSE Chemistry: Energetics

changesinreactions
Energy

othenear
energychange of areachon permoleof asubstanceis canedthemorarerrnaepychangecans
Breakingbondstakesenergyfromtheenvironmentandmakingbondsreleasesenergyto theenviron
were

energyisgiven
o inexothermicreactions near offsothesignofthereactionisnegative
oinendothermicreactionsnearenergyistonerin somesignofthereactionis positive
Leveldiagrams
Energy

Exothermic Endo
ruemic

s
os museralwayswrite infuel on
os
reacraurs producers



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agmeneaceion
Magness Magness
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gwerow wunmenewbonds in the producersareformed
o AH EBondsbroken EC made
Bonds




calorimetry


oAwayofmeasuringhowmuchenergyisramenin a giverour in a reaction byexamininghowmuchthetemperatureof a

reactionmixnineorangesduringareach
on

o asemprecalorimetercanmeasuretemperaturechargesforaqueousorliquidbasedreactions
meee
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o sawionbaseddisplacementreactions g