What is the entropy change of ice to water and water to vapor?

In summary, entropy is a measure of disorder in a system and is affected by changes in the arrangement and movement of molecules. The entropy of ice increases as it melts into water and the entropy of water increases as it vaporizes into steam. During each phase change, the entropy increases as the molecules become less constrained and have more freedom of movement. This is because the molecules in different phases have varying levels of disorder.
  • #1
kukulalalu89
8
0
1.) What is the entropy change of a 33.0 g ice cube that melts completely in a bucket of water whose temperature is just above the freezing point of water? (J/deg)




2.) What is the entropy change of a 7.3 g spoonful of water that evaporates completely on a hot plate whose temperature is slightly above the boiling point of water?
 
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  • #2
Show work.
 
  • #3
I don't even know how to solve the question!

what equations do I need?
 
  • #4
kukulalalu89 said:
what equations do I need?
What equations do you think that you need?
 

1. What is entropy and how does it relate to phase changes?

Entropy is a measure of the disorder or randomness in a system. Phase changes, such as the transition from ice to water and water to vapor, involve changes in the arrangement and movement of molecules, which affects the entropy of the system.

2. What happens to the entropy of ice as it melts into water?

The entropy of ice increases as it melts into water. This is because the molecules in ice are more orderly and have less freedom of movement compared to the molecules in liquid water.

3. Does the entropy of water increase or decrease as it vaporizes into steam?

The entropy of water increases as it vaporizes into steam. The molecules in water are more constrained compared to those in steam, which have more freedom of movement and therefore a higher entropy.

4. How does the entropy change during the phase change from ice to water to vapor?

The entropy increases during each phase change. As ice melts into water and water vaporizes into steam, the molecules become less constrained and have more freedom of movement, leading to an increase in entropy.

5. Why does the entropy of water increase during a phase change?

The entropy of water increases during a phase change because the molecules in each phase have different levels of disorder and freedom of movement. As the molecules move from a more ordered state to a less ordered state, the overall entropy of the system increases.

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