how much energy does it take to melt snow?
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Melting a gram of snow takes about 335 joules of energy. To put that another way, a 60-watt lightbulb is capable of melting about a pound of snow an hour.
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It is shown that the average energy requirement is 21.9 f 4.2 MJ per kg of saleable glass produced. The detailed breakdown of this overall energy by fuel type and by contributing operation is also given.
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Heat energy near the ice gets absorbed into the ice, according to the Second law of thermodynamics. The energy breaks the bonds of the ice, causing it to melt into liquid water. The change from liquid to ice is called solidification. This process will release 80 calories per gram.
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The average person burns 370-715 calories per hour shoveling snow. The number of calories burned will depend on your weight and the intensity of your shoveling. A 150-pound (68kg) person shoveling with moderate effort will burn 379 calories per hour.
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The gravitational binding energy of the sun will give a loose approximation for the energy needed to destroy it by (essentially) removing all it's constituent matter. Lucky for us, this calculation has already been made; the sun's gravitational binding energy is around 6.9 x 1041 (41 is sup script)Joules.
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Fortunately, it's not a high one. Electric blankets use as little as 0.4 kilowatts to stay toasty over four hours, so each one you put on for the evening is only going to cost you about 10 cents. A family of four running their blankets every night for a month will rack up a grand total of $12 in electricity charges.
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There are energy of heating of ice cube from -4.00 °C till the melting point 0°C – q1 and energy of melting of ice cube to liquid water – q2. Answer: during transition of liquid lead to solid block system lost 134.8 kJ; to melt 100 g of ice the system need 31.7 kJ.
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Total heat = Heat required to convert 2 kg of ice to 2 kg of water at 0 °C + Heat required to convert 2 kg of water at 0 °C to 2 kg of water at 20 °C. Therefore, to melt 2 kg of ice 835.48 KJ of heat is required. Happy Reading!
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Total heat = Heat required to convert 2 kg of ice to 2 kg of water at 0 °C + Heat required to convert 2 kg of water at 0 °C to 2 kg of water at 20 °C. Therefore, to melt 2 kg of ice 835.48 KJ of heat is required.
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Shoveling snow: 400-600 calories per hour. Heavy yard work (landscaping, moving rocks, hauling dirt): 400-600 calories per hour. Raking and bagging leaves: 350-450 calories per hour. Gardening: pulling weeds, planting flowers, etc.: 200-400 calories per hour.
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Remember to calculate how many calories are needed to melt the ice. 100 grams x 80 calories/gram = 8000 calories are needed to melt the ice. 10,000 - 8,000 calories = 2000 calories for heating the water. Next, use the remaining calories to change the temperature of the water.
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Ice melts when heat energy causes the molecules to move faster, breaking the hydrogen bonds between molecules to form liquid water. In the melting process, the water molecules actually absorb energy.
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Making that same walk uphill in the snow, and the rate can jump to over 400 calories an hour. According to Bill McArdle, an exercise physiologist and scientific advisor to Weight Watchers International, walking in packed snow increases the calories burned by 60 percent, compared to walking on a paved road.
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For anyone that has shoveled snow, you know it can be a workout! Pushing and throwing that wet, heavy snow can be comparable to a weight-lifting session or even an aerobic workout on the treadmill. According to LiveStrong, an average person can burn 223 calories per 30 minutes while shoveling snow.
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According to SMI Snow Makers, it takes about 75,000 gallons (285,000 liters) of water to create a 6-inch blanket of snow covering a 200x200-foot area (61x61 meters). The system in a good-sized ski slope can convert 5,000 to 10,000 gallons (18,927 to 37,854 liters) of water to snow every minute!
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This says that to make 1 kilogram of ice, it would require 4.55 x 105 Joules of energy.
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How many Joules of energy do you need to melt all the ice into a pure liquid along the path from B to C on the graph? Answer: For 1 kilogram of ice ,which equals 1000 grams, we need 333 Joules/gram x 1000 grams = 333,000 Joules. Problem 3 - The Specific Heat of liquid water is 4180 Joules/kg C.