Name _________________________________________ Date ___________________ Period _________

1. Name _________________________________________ Date ___________________ Period _________ COMMON UNITS OF ENERGY AND CONVERSIONS calorie (lowercase “c”) – The amount of energy needed to raise the temperature of one gram of water by one degree Celsius. Calorie (uppercase “c) – One-thousand calories; the amount of energy needed to raise one kilogram of water by one degree Celsius. Joule – The amount of energy done by applying a force of one newton over a distance of one meter. One calorie = 4.182 joules. BTU – British Thermal Unit; the amount of energy needed to raise the temperature of one pint of water by one degree Fahrenheit. MBTU, MMBTU – One Million BTUs; the amount of energy needed to raise 1,000 pints (125 gallons, 473 liters) of water by one degree Fahrenheit. 1,000 cubic feet of natural gas = 1 MBTU. Watt-second – The work required to produce one watt of power for one second, so one J = 1 W·s. 3412 BTU = 1 kWh 1 BTU = 1,055.06 joules Watt- hour – One watt of power expended over the duration of one hours. 1 W-h is equal to 3,600 J. Kilowatt-hour – One thousand watts of power expended over the duration of one hour. 1 kWh is equal to 3,600,000 J. Therm – 100,000 BTU. Burning one therm of natural gas releases 105,500,000 J (or 25,200,000 calories (lowercase “c”) of energy. One therm is equal to 29.3 kWh. www.eia.gov – the current prices of natural gas and electricity. www.eia.gov/kids -- Scroll down for energy conversion calculators!