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:​

Answer 1

Answer:

The temperature will slightly less than 40°C because water expands when heated.

1 litre of water at 50°C will have less mass than 1 litre of water at 30°C. As a result, the 30°C litre has slightly more than the 50°C litre, and thus the average will end up slightly less than 40°C

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