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in general entropy will not decrease in a spontaneous process since spontaneous process are all irreversible ones. entropy can be reversed only through an reversible process by an ideal engine but it is impossible to create such an engine by violating second law of thermodynamics. hence entropy cannot be decreased practically

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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.


What is isentropic process?

A process takes place from initiation to completion without an increase or decrease in the entropy


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 is isentropic?

A process takes place from initiation to completion without an increase or decrease in the entropy


Is there anyway to decrease the entropy?

Only by increasing the entropy of another system.


Does diffusion involve a decrease in entropy?

no.


When water becomes ice the entropy decreases does this contradict the second law?

No, because the entropy of the surroundings must increase more than the decrease in the water->ice transition, thus the net change in the entropy of the universe is positive, consistent with the second law.


What conditions must be met for a spontaneous process to occur?

For a spontaneous process to occur, the conditions must involve an increase in entropy and a decrease in free energy.


When water freezes should the change in entropy be positive or negative and explain?

Please be aware that the change will be neither positive or negative. You see when "water" freezes the entropy will not change due the tempertaure of the area around it meaning the entropy will stay neutral. You are very welcome young man


What would happen to the entropy in the reaction 2O3 g 3O2 g?

It increases


What results in decrease in entropy?

Water Freezing


What result in a decrease in entropy?

water freezing