1. We know that the heat flow takes place from the hot body to the cold body. He

Question

1. We know that the heat flow takes place from the hot body to the cold body. Here the temperature of iron is 50 °C (hot body)  and that of copper (cold body) is 25 °C. Hence, there will be "heat flow'.

As discussed above, the heat flow takes place from iron (hot body) to copper (cold body).

The final temperature of the copper should be in between 25 °C to 50 °C.

2. We know that

heat lost (-) = heat gain (+)

Here, heat is gain by the copper and heat is lost by the iron. Given, heat lost by the iron (q) is -36 J.

Hence, q for the copper = 36 J (heat gain which is positive).

Explanation / Answer

Questions: 1. Ifa block of copper at 25 oC is placed in contact with a block of iron at 50 °C, will there be "heat flow?" Ir so, from what to what? The final temperature of the copper should be between what two values? 2. For the previous example. q for the iron was -36 J, what is q for the copper ? Why?

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