A rigid tank contains 3 kg of subcooled liquid H2O at 50°C. Anelectric element in the tank is turned on until the temperaturerises to 95°C, where the H2O is now a saturated liquid on the vergeof vaporizing. The tank is not well insulated, thus 10 kJ of heatare lost through its walls. Which is the correct energy balance forthis process? Using the appropriate energy balance, determine theamount of electrical work, We, done during this process. If theprocess takes 5 minutes, what is the power rating of the electricalelement in units of kW?
