Question

The stored electrical energy of a 800-ƒÊ F capacitor charged to 1.20~104 Volts is converted to thermal energy by discharging the capacitor through a heating element submerged in 711.6 g of water in an insulating cup. What is the increase in temperature of the water if the heat capacity of the heater can be ignored? Assume that all of the energy stored on the capacitor goes into heating the water.