Question

A pot containing 1.50 kg of water is sitting on a hot stove, and the water is stirred violently by a mixer that does 8.20 kJ of mechanical work on the water. The temperature of the water rises by 4.00°C. What quantity of heat flowed into the water from the stove during the process? The specific heat of water is 4.186 kJ/kg·K. 

Answer 1

$Q=cm∆t=25.12~kJ.$