What is the entropy change for a system that undergoes a phase transition at constant temperature?
Practice Questions
1 question
Q1
What is the entropy change for a system that undergoes a phase transition at constant temperature?
ΔS = 0
ΔS = Q/T
ΔS = T/Q
ΔS = Q + T
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.
Questions & Step-by-step Solutions
1 item
Q
Q: What is the entropy change for a system that undergoes a phase transition at constant temperature?
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.
Steps: 7
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).
