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1991年上海物理高考试题中,有这样一道多项选择题:关于物体的内能,下列说法正确的是(A)相同质量的两种物体,升高相同的温度,内能增量一定相同。(B)一定量0℃的水结成0℃的冰,内能一定减少。(C)一定量气体体积增大,但既不吸热也不放热,内能一定减少。(D)一定量气体吸收热量而保持体积不变,内能一定减少.此题正确的选项应是(B)和(C)。分析这道试题,选项(A)主要考查了考生对物体内能概念的理解和掌握,而对选项(B)、(C)、(D)尤其是对选项(B)的正确选答,则要求考生必须具备热力学第
In the 1991 Shanghai Physics Examination, there was a multiple-choice question: Regarding the internal energy of an object, the following statement is correct: (A) Two objects of the same mass, raising the same temperature, the internal energy increment must be the same. (B) A certain amount of water at 0°C forms ice at 0°C and the internal energy must be reduced. (C) The volume of a certain amount of gas increases, but it does not absorb heat or heat, and the internal energy must be reduced. (D) A certain amount of gas absorbs heat while keeping the volume constant and the internal energy must decrease. The correct choices for this question should be (B) and (C). To analyze this question, Option (A) mainly examines the examinee’s understanding and mastery of the concept of the internal energy of the object, and the correct selection of options (B), (C), (D) and especially Option (B), The candidate must have thermodynamics