Entropy Flashcards
What happens to disorder when a lattice is dissolved in solution?
There is an increase in disorder due to the dissociation of ions and their freedom of movement in the solution.
The ions are no longer held in position by strong bonds.
What is entropy measured in?
J K-1 mol-1
What does a positive entropy change indicate about the products compared to the reactants?
The products are more disordered than the reactants.
Define entropy
Entropy refers to the measure of the level of disorder in a thermodynamic system.
What is the natural direction of change in a system regarding disorder?
The natural direction of change is towards a more disorderly state, which is a positive change in entropy.
Give an example of a natural and spontaneous process related to entropy.
The natural and spontaneous spreading of gas throughout a room.
What is the equation that relates Gibbs free energy (G) to enthalpy (H) and entropy (S)?
△G = △H - T△S
What is Gibbs free energy?
The balance between entropy and enthalpy in a system, indicating reaction feasibility.
DEFINITION:
GIbbs Free Energy is a measure of the amount of energy available to do useful work in a chemical reaction
What is the unit of measurement for Gibbs free energy?
kJ mol-1
For spontaneous reactions, what is the condition for Gibbs free energy (G)?
△G is negative or equal to zero.
How can the minimum temperature for a spontaneous reaction be determined?
By setting △G equal to zero.
What is the relationship between △G, △H, and T△S in the context of reaction feasibility?
A reaction becomes feasible when △G = 0.
