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> 用相等质量的100℃的水蒸气和100℃的水分别对两个同样的物体加热,结果发现用水蒸气加热的效果好,这是因为()A.水蒸气在液化时要放出热量B.水蒸气要放出汽化热C.水蒸气要吸收汽-物理
用相等质量的100℃的水蒸气和100℃的水分别对两个同样的物体加热,结果发现用水蒸气加热的效果好,这是因为()A.水蒸气在液化时要放出热量B.水蒸气要放出汽化热C.水蒸气要吸收汽-物理
题目简介
用相等质量的100℃的水蒸气和100℃的水分别对两个同样的物体加热,结果发现用水蒸气加热的效果好,这是因为()A.水蒸气在液化时要放出热量B.水蒸气要放出汽化热C.水蒸气要吸收汽-物理
题目详情
用相等质量的100℃的水蒸气和100℃的水分别对两个同样的物体加热,结果发现用水蒸气加热的效果好,这是因为( )
A.水蒸气在液化时要放出热量
B.水蒸气要放出汽化热
C.水蒸气要吸收汽化热
D.同温度的水蒸气比水更热
题型:单选题
难度:中档
来源:不详
答案
用质量相等的10O℃的水蒸气加热物体,水首先放出热量变成水蒸气,比用10O℃的水直接加热物体多了一个水液化放热的过程,所以要对物体加热,用质量相等的10O℃的水和10O℃的水蒸气,水蒸气的效果好些.
故选A.
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题目简介
用相等质量的100℃的水蒸气和100℃的水分别对两个同样的物体加热,结果发现用水蒸气加热的效果好,这是因为()A.水蒸气在液化时要放出热量B.水蒸气要放出汽化热C.水蒸气要吸收汽-物理
题目详情
答案
故选A.