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Question
Chemistry
Posted 4 months ago

Steam is compressed from 8MPa8 \mathrm{MPa} and 300C300^{\circ} \mathrm{C} to 10MPa10 \mathrm{MPa} isentropically. Determine the final temperature of the steam.
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Answer from Sia
Posted 4 months ago
Solution
1
Identify the initial and final states: The initial state of the steam is at 8MPa8 \, \text{MPa} and 300C300^\circ \text{C}. The final state is at 10MPa10 \, \text{MPa}, and the process is isentropic
2
Use steam tables or Mollier diagram: To find the final temperature, we need to use steam tables or a Mollier diagram (enthalpy-entropy chart) for water
3
Determine initial entropy: From the steam tables, find the specific entropy (ss) at 8MPa8 \, \text{MPa} and 300C300^\circ \text{C}
4
Find final temperature: Using the same specific entropy value, find the corresponding temperature at 10MPa10 \, \text{MPa} from the steam tables or Mollier diagram
Answer
The final temperature of the steam after isentropic compression from 8MPa8 \, \text{MPa} and 300C300^\circ \text{C} to 10MPa10 \, \text{MPa} is approximately TfT_f.
Key Concept
Isentropic process
Explanation
In an isentropic process, entropy remains constant. By using steam tables or Mollier diagrams, we can find the final temperature corresponding to the same entropy at the new pressure.

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