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trang1510
2 năm trước
Trong một bình bằng đồng khối lượng 0,6 kg có chứa 4 kg nước đá ở -15°C, người ta dẫn vào 1kg nước ở 100 Các định nhiệt độ chung và khối lượng có trong bình khi có cân Bằng nhiệt. Cho nhiệt dụng tiêu của đồng 400J/kg.K của nước là 4200J/kg.K ; của nước đã là "100J/kg.K và nhiệt nóng chảy nước đá là 3,4.10^5J/kg.
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