Question

One litre of water at 20℃is mixed with one litre of water at 40℃.
The temperature of the mixture will be
a) 60℃ b) more than 40℃ but less than 60℃
c) 20℃ d) between 20℃ and 40

Answer 1

Answer:

When one liter of water at 20 degree Celsius is mixed with one liter of water at 40 degree Celsius.

The temperature of the mixture will be in between 20 and 40 degree Celsius.

This is because of the first law of thermodynamics.

Whenever two bodies at different temperatures are kept in contact the body at a higher temperature will start losing heat to the body at lower the temperature until both the temperature becomes equal.

When one liter of water at 20 degree Celsius is mixed with one liter of water at 40 degree Celsius.