KINETIC AND POTENTIAL ENERGY WORKSHEET
Calorie:? Defined as the amount of energy required to increase the temperature of 1 gram water by 1 degree Celsius.Kilocalorie: A kilocalorie is 1000 calories and is used primarily for measuring energy in food. If you count “calories” when you eat, you’re actually counting kilocalories. A kilocalorie is sometimes called a “Calorie” (notice the capitalization).Joule: Defined as the amount of energy required to apply a force of 1 newton across a distance of 1 meter. Both calories and joules measure energy. One calorie is a larger unit, with 1 calorie equal to 4.2 joules.Kilojoule: 1000 joulesBritish Thermal Unit (BTU):?Defined as the amount of energy required to increase the temperature of one pound of water by one degree Fahrenheit. This is equivalent to 1055 Joules. In the United States, the ability of furnaces to warm the air by adding energy and the ability of air conditioners to extract energy from air is expressed in BTUs.Conversion Factors:1 kilocalorie = 1000 calories1 kilojoule = 1000 joules1 calorie = 4.2 joules1 BTU = 1055 joules1 BTU = 252 caloriesEquationsQ = m Δt m = mass in gramsΔt = change in temperature (Δt = tfinal - tinitial)Convert from one unit to the other: 1.69 Joules to calories 0.3587 J to cal 820.1 J to kilocalories 68 calories to kilocalories 423 calories to kilocalories 20.0 calories to Joules 252 cal to J 2.45 kilocalories to calories 556 kilocalories to BTU6.78 kilocalories to kilojoules 59.6 calories to kcal 449.6 joules to kilojoules 9.806 kJ to BTU5.567 cal to J Determine the heat energy that is transferred in each of the following. Provide an answer in calories and joules.20.0 g of water is heated from 16.8 °C to 39.2 °C. 35.0 g of water is cooled from 56.5 °C to 5.9 °C. 50.0 g of liquid water is heated from 0.0 °C to 100.0 °C. ................
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