Topic 6 Flashcards
Equilibrium of formation is…
The enthalpy change when one mole of a substance is formed from its elements in their standard states
What is the third law of thermodynamics?
At absolute zero aCrystal lattice has perfect order and an entropy of zero.
What would happen with an increase in entropy?
Would give a positive standard entropy change
What happens when entropy decreases?
Standard entropy change will be negative
What is the second law of thermodynamics?
The total entropy of a reaction system and its surroundings always increases for a spontaneous process
When is a reaction feasible?
When DeltaG is negative
What happens when delta H is positive and delta S is negative?
Delta g is positive and no spontaneous reaction
What happens when delta h is negative and delta s is positive?
Delta g is negative and there is always as spontaneous reaction
What happens when both delta h and s are negative?
Delta g is negative at low temp and positive at high temp. Spontaneous reaction is temperature dependent
What happens when delta h and s are positive?
Delta g is positive at low temp and negative at high temp. Spontaneous reaction is temperature dependent
Temperature formula
Delta h/delta s
