Question

Emily is testing her baby’s bath water and finds that it is too cold, so she adds some hot water from a kettle on the stove. If Emily adds 2.00 kg of water at 80.0° C to 20.0 kg of bath water at 27.0° C, what is the final temperature of the bath water?

Answer 1

the hot water looses heat , and the bath water gains heat

[80.0ºC - (final temp)] * 2.00 kg = [(final temp) - 27.0ºC] * 20.0 kg