Chapter - 1 Heat

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Q
Heat

Question:

One litre of water at 30°C is mixed with one litre of water at 50°C. The temperature of the mixture will be

(a) 80°C                 (b) more than 50°C but less than 80°C

(c) 20°C                 (d) between 30°C and 50°C

Answer:

The correct option is:

(d) between 30°C and 50°C.

The temperature of the mixture will be between 30°C and 50°C because when two bodies at different temperatures are kept in contact with each other then the body at a higher temperature will start losing heat towards the temperature of the body at lower temperature and the body at a lower temperature will start gaining heat towards the temperature of the body at a higher temperature until both the temperature becomes equal.


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