What is the entropy change for a system that undergoes a phase transition at con

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Question: What is the entropy change for a system that undergoes a phase transition at constant temperature?

Options:

Correct Answer: ΔS = Q/T

Solution:

During a phase transition at constant temperature, the change in entropy is given by ΔS = Q/T, where Q is the heat absorbed or released.

What is the entropy change for a system that undergoes a phase transition at constant temperature?

What is the entropy change for a system that undergoes a phase transition at constant temperature?

Step 1: Understand that a phase transition is when a substance changes from one state of matter to another, like from solid to liquid (melting) or liquid to gas (vaporization).
Step 2: Recognize that during this transition, the temperature remains constant.
Step 3: Know that 'entropy' is a measure of disorder or randomness in a system.
Step 4: Learn the formula for calculating the change in entropy (ΔS) during a phase transition: ΔS = Q/T.
Step 5: Identify 'Q' as the amount of heat energy that is absorbed or released during the phase transition.
Step 6: Identify 'T' as the constant temperature at which the phase transition occurs, measured in Kelvin.
Step 7: Substitute the values of Q and T into the formula to calculate the change in entropy (ΔS).

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