Q. What is entropy?
The measure of disorder of a system.
Q. In terms of entropy, when is a system more stable?
A system is more stable when its energy is spread out and in a more disordered state. The higher the entropy, the more stable the system.
Q. How does entropy change as temperature changes?
As the temperature increases, the particles in a substance gain kinetic energy and become more disordered. As a result, entropy increases.
Q. How does entropy change during a reaction in which the number of gas molecules changes?
Entropy increases if the number of gas molecules increases. This is because the gaseous state has the highest entropy, as there is more disorder in the system.
Q. When will delta S be positive?
When disorder increases:
- State change
- Increase in temperature
- Increase in the number of gaseous molecules
Q. What is Gibbs free energy?
- The overall change in energy during a reaction is the Gibbs free energy.
- This energy change consists of an entropy change and an enthalpy change at a given temperature.
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