如图2-4所示,理想气体从状态A出发经ABCDA循环过程回到初态A,则在一循环中气体净吸收的热量为 ( )J。 A. 3.2x104 B. 1.6X1...

作者: tihaiku 人气: - 评论: 0
问题 如图2-4所示,理想气体从状态A出发经ABCDA循环过程回到初态A,则在一循环中气体净吸收的热量为 ( )J。
选项 A. 3.2x104 B. 1.6X104 C. -3.2x104 D. -1.6X104
答案 B
解析 提示:循环一周气体净吸收的热量为曲线所包围的面积,也等于净功。Q = W = (PA-PD)(VB-VA) = 20x105x8x10-3J = 1.6X104 J。
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