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The products becoming more ordered than the reactants
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What happens to the entropy in the reaction?
Entropy increases. In a reaction comprised of sub-reactions, some sub-reactions may show a decrease in entropy but the entire reaction will show an increase of entropy. As an example, the formation of sugar molecules by living organisms is a process that shows decrease in entropy at the expense of the loss of entropy by the sun.
What must happen to the entropy of the universe during a spontaneous reaction or process?
The entropy of the universe must increase during a spontaneous reaction or process. This is in accordance with the Second Law of Thermodynamics, which states that the total entropy of an isolated system can never decrease over time.
The favorability or spontaneity of a reaction increases when during the course of a reaction?
The favorability or spontaneity of a reaction increases when the overall entropy of the system increases, or when the free energy of the system decreases. This can happen when reactants are in a more disordered state, when the system achieves greater stability, or when the reaction releases heat.
Does diffusion involve a decrease in entropy?
no.
When water becomes ice the entropy decreases does this contradict the second law?
No, the decrease in entropy of water turning into ice does not violate the second law of thermodynamics. The second law states that the total entropy of an isolated system can never decrease, but entropy can decrease locally within the system as long as there is a corresponding increase in entropy elsewhere. In the case of water turning into ice, the decrease in entropy of the water molecules is offset by an increase in entropy in the surroundings.
