酒精的热值是3.0×107_1（填单位），完全燃烧400g酒精，放出的热量是_2；若把一瓶酒精倒去一半，剩下酒精的热值为_3．_刷题宝

题干

酒精的热值是3.0×10⁷____（填单位），完全燃烧400g酒精，放出的热量是____；若把一瓶酒精倒去一半，剩下酒精的热值为____．

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答案(点此获取答案解析）

J/kg,1.2×10⁷J,3.0×10⁷J/kg

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