用煤气灶烧水时,把2kg的水从25℃加热到75℃,燃烧了0.03m³的煤气.设煤气完全燃烧.水的比热容为4.2×10³J/(kg℃),煤气的热值约为4.0×10^7J/m².求(1)水吸收的热量(2)煤气灶烧水时的
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![用煤气灶烧水时,把2kg的水从25℃加热到75℃,燃烧了0.03m³的煤气.设煤气完全燃烧.水的比热容为4.2×10³J/(kg℃),煤气的热值约为4.0×10^7J/m².求(1)水吸收的热量(2)煤气灶烧水时的](/uploads/image/z/150207-15-7.jpg?t=%E7%94%A8%E7%85%A4%E6%B0%94%E7%81%B6%E7%83%A7%E6%B0%B4%E6%97%B6%2C%E6%8A%8A2kg%E7%9A%84%E6%B0%B4%E4%BB%8E25%E2%84%83%E5%8A%A0%E7%83%AD%E5%88%B075%E2%84%83%2C%E7%87%83%E7%83%A7%E4%BA%860.03m%26%23179%3B%E7%9A%84%E7%85%A4%E6%B0%94.%E8%AE%BE%E7%85%A4%E6%B0%94%E5%AE%8C%E5%85%A8%E7%87%83%E7%83%A7.%E6%B0%B4%E7%9A%84%E6%AF%94%E7%83%AD%E5%AE%B9%E4%B8%BA4.2%C3%9710%26%23179%3BJ%2F%28kg%E2%84%83%EF%BC%89%2C%E7%85%A4%E6%B0%94%E7%9A%84%E7%83%AD%E5%80%BC%E7%BA%A6%E4%B8%BA4.0%C3%9710%5E7J%2Fm%26%23178%3B.%E6%B1%82%EF%BC%881%EF%BC%89%E6%B0%B4%E5%90%B8%E6%94%B6%E7%9A%84%E7%83%AD%E9%87%8F%EF%BC%882%EF%BC%89%E7%85%A4%E6%B0%94%E7%81%B6%E7%83%A7%E6%B0%B4%E6%97%B6%E7%9A%84)
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