entropy Flashcards
1
Q
second law of thermodynamics
A
spontaneous processes increase the entropy of the universe
2
Q
how to calculate deltaS
A
sum of product S - sum of reactant S
3
Q
how to calculate deltaG
A
deltaG = deltaH - TdeltaS
(kJ mol-1) = (kJ mol-1) - (K) x (convert to kJ mol-1, usually given in J mol-1)
4
Q
how to calculate T min (minimum temperature a reaction can happen)
A
deltaH / deltaS
5
Q
why might a feasible reaction not be spontaneous?
A
-temp may be too low to reach activation energy
-particles may not collide (which they must to do react)
6
Q
how can you tell if a reaction is feasible?
A
deltaG must be negative
