Suppose that your morning shower is 7 minutes long and uses 4 gallons of water per minute that is a nice 102 F in temperature. How much energy (kJ) must be used to heat the water for your shower if the water coming into your house is at 60 F? The heat capacity of water is 4.18 J/g ·K and the density of water is 1 g/cm 3. The units are kJ.

Answer 1

change 60F to degrees C,and change 102F to degrees C, then subtract, and find the change in temp in C

Now, change 4 gallons to liters, then to kg.

heat=kgwater*specificheatwater*changeTemp