March 28, 2017

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What would be the final temp when 100 kg of 0 degrees Celcius cold water is mixed with 60 kg of 35 degrees warm water?

Ans is in degrees Celcius.

The sum of the heats gained is zero (remember one will lose heat, so have a negative heat gained).

Heatgained by cold water + heat gained by hot water=0

100kg*c*(finaltemp-0)+ 60kg*c*(finaltemp-35)=0
solve for final temp. Notice the specific heat c divides out.

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