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phamthitrangabcd2003
2 năm trước
2kg nước được đun nóng từ 20 độ C đến khi sôi và 0,5 kg đã biến thành hơi. Tính nhiệt lượng cần thiết để làm việc đó . Nhiệt dung riêng của nước là 4200 J/kg.k , nhiệt hóa hơi của nước là2,3.19^6 J/kg.k
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