Is there an Entropy difference between a cold and hot body

Thread starter annaphys
Start date May 5, 2018
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Body Cold Difference Entropy Hot

In summary: So the change of Q = 0 and the temperature of the system is constant.In summary, the entropy of the system is increased by 1000 J due to the transfer of heat.

May 8, 2018

alantheastronomer

annaphys said:

Where does this equation exactly come from? Why would the internal energy be zero when there is internal energy in the system? The difference in the internal energy is zero but nonetheless there is internal energy.

The internal energy isn't zero; the CHANGE in internal energy is zero!

<h2>1. What is entropy?</h2><p>Entropy is a measure of the disorder or randomness in a system. It is a fundamental concept in thermodynamics and is often described as the measure of the unavailable energy in a closed thermodynamic system.</p><h2>2. How does temperature affect entropy?</h2><p>Generally, as temperature increases, so does entropy. This is because at higher temperatures, molecules have more energy and are more likely to be in a state of disorder. However, there are exceptions to this rule, such as in phase transitions where the entropy may decrease even as the temperature increases.</p><h2>3. Is there a difference in entropy between a cold and hot body?</h2><p>Yes, there is a difference in entropy between a cold and hot body. This is because a hot body has more thermal energy and therefore more disorder, leading to a higher entropy compared to a cold body.</p><h2>4. How is entropy related to the second law of thermodynamics?</h2><p>The second law of thermodynamics states that the total entropy of a closed system will never decrease over time. This means that in any process, the total entropy of the system and its surroundings will either remain constant or increase. This law is closely related to the concept of entropy and helps to explain the direction of natural processes.</p><h2>5. Can entropy be reversed?</h2><p>No, entropy cannot be reversed. The second law of thermodynamics states that the total entropy of a closed system will never decrease, meaning that once entropy has increased, it cannot be reversed. However, in some cases, it is possible to decrease the entropy of a system by increasing the entropy of its surroundings, but the total entropy will always remain the same or increase.</p>

1. What is entropy?

Entropy is a measure of the disorder or randomness in a system. It is a fundamental concept in thermodynamics and is often described as the measure of the unavailable energy in a closed thermodynamic system.

2. How does temperature affect entropy?

Generally, as temperature increases, so does entropy. This is because at higher temperatures, molecules have more energy and are more likely to be in a state of disorder. However, there are exceptions to this rule, such as in phase transitions where the entropy may decrease even as the temperature increases.

3. Is there a difference in entropy between a cold and hot body?

Yes, there is a difference in entropy between a cold and hot body. This is because a hot body has more thermal energy and therefore more disorder, leading to a higher entropy compared to a cold body.

4. How is entropy related to the second law of thermodynamics?

The second law of thermodynamics states that the total entropy of a closed system will never decrease over time. This means that in any process, the total entropy of the system and its surroundings will either remain constant or increase. This law is closely related to the concept of entropy and helps to explain the direction of natural processes.

5. Can entropy be reversed?

No, entropy cannot be reversed. The second law of thermodynamics states that the total entropy of a closed system will never decrease, meaning that once entropy has increased, it cannot be reversed. However, in some cases, it is possible to decrease the entropy of a system by increasing the entropy of its surroundings, but the total entropy will always remain the same or increase.