物理比热容的题目

2025-04-03 03:49:34
推荐回答(4个)
回答1:

由题意可知水温高于甲乙两者的温度。且两者均吸收了相当于水降低5摄氏度所放出的热量。则两者吸收的热量和初温均相同。
而甲的末温等于水降低5摄氏度后的温度,而乙的末温等于水降低10摄氏度后的温度,即乙升高的温度较低。
根据Q=cm△t,已知Q、m相同,甲的△t较大,故比热容较小。

回答2:

首先甲乙的质量和初温相同,又无热量和质量的损失,也没有物态变化,所以质量可以不去管它,上述的过程只是热传递.
甲放入一杯热水中,充分搅拌后,水温降低了5摄氏度,
那么就是说甲要吸收水降低5摄氏度放出的热量后的温度才能和水的温度-5后的温度相等
将甲取出后,将乙放入后,充分搅拌后,水温也降低了5摄氏度,
也就是说乙要吸收甲和水降低5摄氏度放出的热量后的温度才能相等,所以是乙的比热容大!不知道对不对哦!

回答3:

楼上对了我刚考完

回答4:

甲的△t较大?为什么 ???

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