Hot water is at 80 deg C and cold water is at 30 deg C. When mixed, heat flows from
AThe cold water to the hot water
BThe hot water to the cold water
CBoth directions equally and at once
DNeither side because they are in contact
Answer & Solution
Correct answer: B. The hot water to the cold water
1. The chapter illustrates this with bodies at 80 deg C and 30 deg C.
2. Heat flows from hot body A to cold body B.
3. It continues until both reach the same temperature.
4. So option A is correct.
_Source: Selina Concise Physics Class 8, Ch 5 Heat (Mistral OCR'd PDF), section on flow of heat_
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