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huongtra23122k1
2 năm trước
Đổ 400 g nước ở 430C vào một cái bình bằng nhôm có khối lượng 260 g ở nhiệt độ 180C. Bỏ qua sự trao đổi nhiệt với môi trường ngoài. Xác định nhiệt độ của hệ khi xảy ra cân bằng nhiệt. Cho nhiệt dung riêng của nước là c1 = 4180 J/(kg.K) và của nhôm là c2 = 880 J/(kg.K).
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