如图11-9-1所示实验装置,把浸有乙醚的一小块棉花放在厚玻璃筒内底

如图11-9-1所示实验装置,把浸有乙醚的一小块棉花放在厚玻璃筒内底部,当很快向下压活塞时,由于被压缩的气体骤然变热,温度升高达到乙醚的燃点,使浸有乙醚的棉花燃烧起来.此实验的目的是要说明对物体做功

A.可以增加物体的热量

B.物体将燃烧放热

C.一定会升高物体的温度

D.可以改变物体的内能

答案

D

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