why do chemical reactions take place
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14 Terms
reactions that are spontaneous involve
mixing and spreading out
entropy
randomness of a system
why does a mixture have a high entropy
Because the particles can be arranged in a lot of different ways
will entropy S be + or - when products are more disordered than reactants
+
why do entropies increase with temperature
because particles spread out and are more disordered
factors that govern feasibility of a reaction
enthalpy change
entropy chnage
what happens if G is positive
reaction is not feasible (not occur)
formula for gibbs free energy
G= H-T(S)
what unit is temperature measured in
Kelvin
Formula for calculating entropy of a system
Products-reactants
How to convert JK-1mol-1 to kJK-1mol-1
Divide by 1000
graphite is said to be
kinetically stable
what could it mean if a reaction is feasible but is not taking place
reactants are solids
large activation energy
what does it represent when g=0
first temperature when reaction becomes feasible
Note 
Flashcards (20)