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How does the entropy of the system change when the temperature of the system increases? How...

How does the entropy of the system change when the temperature of the system increases?

How does the entropy of the system change when the volume of a gas increases?

How does the entropy of the system change when equal volumes of ethanol and water are mixed to form a solution?

Do these increase decrease or stay the same?

Science   Chemistry   
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Answer #1

Changes in temperature will lead to changes in entropy. The higher the temperature the more thermal energy the system has; the more kinetic energy the system has, the more the disorderedness; therefore the higher the entropy. Increasing the temperature will increase the entropy.

Changes in volume will lead to changes in entropy. The larger the volume the more ways there are to distribute the molecules in that volume; the more ways leads to more disorderedness, the higher the entropy. An increase in volume will increase the entropy.

When equal volumes of ethanol and water are mixed to form a solution, the entropy of the resulting solution increases. Because they have similar attractions due to the presence of hydrogen bonding. This means that molecules of water and ethanol freely move with each other, therefore increasing the dispersal, randomness, and disorder (entropy) of the system.

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