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Drivers of Reactions (Enthalpy and Hess's Law (chemical reactions…
Drivers of Reactions
Enthalpy and Hess's Law
chemical reactions
bonds broken
endothermic
Bonds form
exothermic
Law of conservation of energy
Hess
Delta H is same regardless of steps involved
Bond energy
Standard enthalpy change
Heat of combustion
Photosynthesis
endothermic
Respiration
exothermic
Entropy and Gibbs Free energy
Balance
sponteneity
classify reactions
Type 1 and 2
spontaneous
Type 3 and 4
non-spontaneous
enthalpy
release favoured
exothermic
entropy
increase favoured
Gibbs Free Energy
Equation in book
Temperature changes Delta G
Entropy decreases delta S -ve
Entropy increases delta S +ve
Entropy, S
randomness
Disorder
Enthalpy, H
energy
Energy changes in Chemical Reactions
Combustion
Exothermic
Calorimeter
Water temp increases
Dissociation of ionic substances
Endothermic
KI
Calorimeter
Decrease water temp
Exothermic
NaOH
Calorimeter
Increase water temp
Catalyst
Decreases energy needed
energy graph in book