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When water freezes it _releases_ energy (the heat of fusion, 333.55 kj.kg). To keep it from freezing, simply keep the energy constant. If the ambient temperature is below zero C (32 F) the rate of energy loss will depend on the temperature of the air and the thermal resistance (insulation value) of the water's container, and other factors such as wind speed. In those conditions you must replace the energy lost to prevent the water from freezing. However, the energy needed depends on the rate of loss, not on the amount of water.
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How much denatured alcohol to keep 1 gallon of water from freezing at 20 degrees f?
To prevent water from freezing at 20°F, you should mix in approximately 6-7 ounces of denatured alcohol per gallon of water. Denatured alcohol lowers the freezing point of water by decreasing its freezing temperature.
How many watts of energy are in a gallon of salt water?
The energy content of a gallon of salt water would depend on the concentration of salt in the water. On average, seawater contains about 3.5% salt. Using this concentration, a gallon of salt water would contain very minimal energy in the form of trace amounts of potential thermal energy due to the dissolved salt. It would not be practical to extract energy from a gallon of salt water in this context.
What mass of water would release 16700J of energy when freezing?
The heat of fusion for water is 334J/g. To find the mass of water that would release 16700J when freezing, you would divide the total energy by the heat of fusion: 16700 J / 334 J/g = 50g of water.
Why is the temperature needed to freeze the ocean water lower than the temperature needed to freeze the surface of a freshwater lake?
Ocean water has a lower freezing point than freshwater due to the presence of dissolved salts, which lowers the freezing point of water. The salt in the ocean water disrupts the hydrogen bonds between water molecules, making it harder for the water to freeze. This is why ocean water freezes at a lower temperature than freshwater.
What takes longer ice melting or water freezing?
Ice melting typically takes longer than water freezing because melting requires the addition of heat energy to break the bonds holding the solid water molecules together. In contrast, freezing involves the removal of heat energy to slow down the movement of water molecules and form a solid structure.
How much denatured alcohol to keep 1 gallon of water from freezing at 20 degrees f?
To prevent water from freezing at 20°F, you should mix in approximately 6-7 ounces of denatured alcohol per gallon of water. Denatured alcohol lowers the freezing point of water by decreasing its freezing temperature.
Is water freezing energy?
Water freezing is not considered energy itself, but rather a process that releases energy. When water freezes, it releases heat energy into its surroundings. The process of freezing involves the removal of energy from the water molecules, causing them to slow down and form a solid structure.
How many halfpint cartons of water are needed to fill the gallon container?
16 halfpint cartons of water are needed to fill the gallon container
Does freezing water have physical energy or chemical?
physical energy
When water is freezing is thermal energy released or absorbed?
When water freezes, thermal energy is released from the water as it changes from a liquid to a solid. This released energy is responsible for lowering the temperature of the water to its freezing point and then further to form ice.
How much salt is needed to stop 200ml of water freezing?
7 table spoons of salt stops 500ml of water from freezing
How much energy is generated from freezing 2.5g water?
The amount of energy generated from freezing 2.5g of water can be calculated using the specific heat capacity of water and the heat of fusion for water. The energy released would be equal to the heat of fusion of water (334 J/g) multiplied by the mass of water (2.5g). By multiplying these values, you can determine the total energy released during the freezing process.
How much heat is needed to increase the temperature of 1 gallon of water?
Any amount of energy you like greater than 0; the larger the amount of energy you give it, the larger the temperature increase will be. Perhaps you should specify by how much temperature you want the gallon of water to increase and you may get a more specific answer.
How many watts of energy are in a gallon of salt water?
The energy content of a gallon of salt water would depend on the concentration of salt in the water. On average, seawater contains about 3.5% salt. Using this concentration, a gallon of salt water would contain very minimal energy in the form of trace amounts of potential thermal energy due to the dissolved salt. It would not be practical to extract energy from a gallon of salt water in this context.
How do you stop water from freezing?
heat it up, add energy to it
How much salt is needed to stop 100ml of water freezing?
Salt lowers the freezing point of water. To prevent 100ml of water from freezing, you need to add approximately 6-7 grams of salt.
What would be the result of removing heat energy from a cup of water?
Removing heat energy from a cup of water would cause the temperature of the water to decrease, eventually leading to it cooling down and possibly freezing if it reaches the freezing point.
