酒精的热值为3×107J/kg,完全燃烧280g的酒精可放出多少热量?若这些热量 发布时间:2017-07-30 21:10 │ 来源:www.tikuol.com 题型:问答题 问题: 酒精的热值为3×107J/kg,完全燃烧280g的酒精可放出多少热量?若这些热量全部用来给40kg、20℃的水加热,不计热量损失,将使这些水的温度上升为多少℃?
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