1kg水温度降低10℃放出的热量是______J.
人气:204 ℃ 时间:2019-11-15 22:44:36
解答
Q放=cm△t
=4.2×103J/(kg•℃)×1kg×10℃
=4.2×104J.
故答案为:4.2×104.
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