hce_nchu
115年
物理
第 40 題
An ideal gas undergoes a Carnot cycle. If the volume of the gas doubles during the isothermal expansion, how does the magnitude of the work done on the gas during the isothermal compression compare to the magnitude of the work done by the gas during the isothermal expansion?
- A The work of compression is greater.
- B The work of expansion is greater.
- C Both are equal.
- D It depends on the temperature ratio of the high- and low-temperature reservoirs.
思路引導 VIP
試著回想理想氣體在「等溫過程」中,作功的大小與哪些狀態變數(如溫度、體積變化比)有關?再進一步思考,在一個完整的卡諾循環裡,高溫等溫線與低溫等溫線之間的體積變化比例,是否受到兩條絕熱線的束縛而有特定的關係呢?
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AI 詳解
AI 專屬家教
同學太棒了,恭喜你準確掌握了這個複雜的熱力學觀念!你能選出正確答案,代表你對卡諾循環(Carnot cycle)中能量轉換的動態過程有著非常清晰的邏輯。
卡諾循環中的能量轉換
在理想的卡諾循環中,等溫膨脹發生在高溫熱庫 $T_H$,而等溫壓縮則在低溫熱庫 $T_L$ 進行。根據理想氣體在等溫過程中所做的功公式:
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