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The answer to this question depends on several factors. First, what is the volume of the water, and what shape is the container? Two gallons of water in the same shaped container as a gallon of water will cool at a slower rate. A gallon of water in a cube will cool more slowly than a gallon of water in a flat tray, because the water will exchange heat with its surroundings at the surfaces, and the water in the tray will have a much higher surface to volume ratio. Also, you really haven't defined hot and cool in your question. Once you do define those aspects, you have to also define what the surrounding temperature of the air or fluid into which the hot or cold water's container is placed. You'd also want to know the altitude, since that will affect the rate of heat exchange as well. So, there really is no answer to this question, except the empirical answer that you can get by just putting a thermometer in the hot water and watching the time it takes to reach your desired cool temperature.
Dimitri Welch
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∙ 13y agoWater cools down by conduction to the vessel it is contained in, and to the air. The cooling rate depends on the conductivity and temperature of the surrounding materials, and on the water's temperature.
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∙ 15y agoWiki User
∙ 9y agoThe cooling rate is the amount of temperature lost per second. For water, the cooling rate is 0.067 degrees Celsius per second.
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∙ 12y agoThe rate at which water boils is proportional to the energy supplied to it.
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∙ 9y agothe water will turn into ice
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∙ 15y agojdklsjadjlkj
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Why does hot water cool quicker in the first 5 minutes?
This is because of newtons law of cooling, the rate that the water cools is proportional to the difference between the temperature of the water and the temperature of the surroundings. So, as the water is hotter it cools faster, as it cools down the rate of cooling decreases.
Why does cold water freeze fastest then room temperature water and lastly warm water?
Because given that colder air is removing heat from the water, there is more energy to remove from the warmer water. The RATE of cooling is constant regardless of the initial temperatures of either the water or the air. Except for the following : The freezing of water requires two different reductions in heat. You first lower the temperature to 32°F (0° C). At that point the water will not spontaneously freeze, because molecular motion has to stop for ice crystals to form their orderly lattice. This is easily observed when cooling water in a very cold environment : the temperature will drop steadily and at the same rate until it reaches 32°F, at which point the decline will halt temporarily until ice crystals are formed. Once the water is entirely ice, the ice's temperature will resume its former rate of cooling. The heat required to melt ice or freeze water at its freezing point is called the "heat of fusion", and a similar but varying heat is required for all other substances that experience a change in state from liquid to solid.
Why the flow rates of water affect the difference of inlet and outlet temperatures?
The flow rate of the water determines the cooling load. As you increase and decrease the flow, the load is being increased and decreased. The system is designed to be most efficient at a certain specific load, and it is at that point that the COP will be at it's maximum. Any flow rate above and below that point will decrease the COP.
How does salt affect the cooling rate of water?
Salt influences heating/cooling of water.When we want to heat a seawater from 20 to 50 degrees in an electrical kettle, we'll spend more time and electricity for doing it, than for usual water.ProofTo determine the value of heat, that has been added/removed to/from water the following law is used:dQ=m*C*dTwheredQ - amount of added/removed energy (heat), kJm - mass, kgC - specific heat capacity, kJ/kg-K (depends on a type of material)dT - change of temperature, C (or K)Changing specific heat capacity, one changes ability of a material (in the case - water) to absorb/dissipate heat, in a same range of a temperature change.Example. There is 1 kg of usual water, its' temperature is changed on 10 deg K.C of water is 4.18 kJ/kg-k. Amount of heat Q, that water excepts is:Q=1*4.18*10=41.8, kJC of salted water is 4.8 (depends on salinity), so amount of heat, that salted water absorbs is 48 kJ.That means, that to change temperature of salted and usual water on a same amount of degrees, we need to put more heat in a salted water.
When drops of water collect on surface near the ground due to cooling it is called a?
The water is known as dew.
How would bigger mass in the water affect the cooling rate?
Say you are cooling liquid A with water. The rate of heat transfer is given by Q = mH2OCpH2OdTH2O = mACpAdTA, where m is the mass, Cp is the mean heat capacity and dT is the change in temperature. So, if you increase m, the mass of water, Q increases (the rate of heat transfer increases) and hence the cooling rate would increase. And if m were to be decreased, the cooling rate would decrease. Strictly speaking, it should be the mass flowrate and not the mass that would be the parameter.
What conclusion can you make about the effect of the evaporation on cooling?
what is the conclusion of evaporate rate water
Will the surface area of a container affect the cooling rate of water?
Yes. Other things being equal, the cooling rate should be more or less proportional to the surface area.
Why does hot water cool quicker in the first 5 minutes?
This is because of newtons law of cooling, the rate that the water cools is proportional to the difference between the temperature of the water and the temperature of the surroundings. So, as the water is hotter it cools faster, as it cools down the rate of cooling decreases.
Which causes more cooling ether or water?
Assume question is about evaporative cooling rate Ether had vapour pressure of around 0.7 ATM it would be readily evaporate in air. The ether would be a lot colder than water and cause higher cooling rate. However, if the matter talk about conduction cooling or cooling per unit mass it might be different answer from above.
How does the rate of cooling water change?
because of the thermal energy being released from the hot water and dissipated into the air.
How does surface area affect the rate of cooling of soup?
Increased surface area increases cooling. Cooling occurs by convection of air above the soup and water vapour loss.
What is the effect of cooling on pulse rate?
Cooling slows heart rate, thus slowing the pulse rate.
What are differences in heating and cooling rates of land and water?
How do the heating and cooling differences between land and water affect us? ...
Why does the adiabatic rate of cooling change when condensation begin?
When water changes state from a vapor to a liquid it release heat.
How humidity affects the water cooling process?
When water can evaporate, the absorption of heat by the vaporizing water adds a significant amount of cooling. When the ambient humidity is already high, less water can evaporate before the air become saturated with water vapor and consequently cooling is more difficult. When ambient humidity is low, more water can evaporate before the air becomes saturated with water vapor - and thus more cooling can occur for the same flow rate of water.
Why do some types of batteries stays fresh longer if they are kept in a refrigerator?
Cooling lowers the rate of the chemical reaction in the batteries.
