【題目】關(guān)于物體的內(nèi)能，下列說法不正確的是（ ）

A. 燒開的水有內(nèi)能。 B. 在草地上滾動的足球有內(nèi)能。

C. 物體的溫度升高時(shí)，內(nèi)能會增大。 D. 水結(jié)冰時(shí)溫度不變，所以內(nèi)能不變。

【答案】D

【解析】

試題分析： A. 一切物體都有內(nèi)能，因此燒開的水有內(nèi)能；在草地上滾動的足球有內(nèi)能，AB正確；

C. 物體的溫度升高時(shí)，分子運(yùn)動越激烈，動能越大，因此內(nèi)能會增大，C正確； D. 水結(jié)冰時(shí)溫度不變，當(dāng)繼續(xù)放熱，因此內(nèi)能減小，不是不變，D錯(cuò)誤。

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