Calculate the energy used, in kilojoules, to power a 100‑watt lightbulb continuously over a 24-hour period. How much coal would have to be burned to provide this quantity of energy, assuming that the enthalpy of combustion of coal is 33 kJ/g and the power plant has an efficiency of 35%? [Electrical energy for home use is measured in kilowatt hours (kW-h). One watt is defined as 1 J/s, and1 kW-h is the quantity of energy transferred when 1000 watt is dispensed over a 1.0-hour period.]