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How much heat must be removed from 7.50 kg of water to freeze it at its melting point?
Wiki User
∙ 8y ago
2500
Wiki User
∙ 8y ago
Wiki User
∙ 14y agoNone. At 0 degrees Celsius the water is already frozen.
Roger.
that's wrong the energy required is 754 kJ but i don't know how to work it out
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Are freezing and melting point the same?
Yes the melting and freezing points are the same.
Does salt affect the melting of ice or not?
Adding Salt to water will lower its melting point by about 5 degrees Centigrade. When it is cold outside, you spread salt over the roads so that even if the water is at -3 degrees, it will won't freeze.
The temperature at which a solid becomes a liquid is called the what?
Simply, the melting point. Think of an ice cube. The melting point is the temperature at which the ice cube MELTS into a liquid.
What is the melting point of water at sea level and what happens to this point at altitudes above sea level?
i think you mean what is the melting point of ice as water cant melt. the melting point of ice at sea level is 100 degres celsius
How can the melting point of water be changed?
by adding impurities the melting point of ice can be increased.... and perhaps can water melt i think the right question suppose to be how can the melting point of ice be changed?
To freeze water what is the Celsius?
The freezing point of water (also known as the melting point) is 0 degrees Celsius
Does salt decrease the melting point of water?
Yes, sea water can freeze up to - 3 0C.
What will happen if you cool water down below its melting point?
Depends on the pressure the water is under, but normal water will freeze.
What does the salt do to the melting point of water?
Salt lowers the melting point of water. The water will have to be at a colder temperature to freeze since the salt inhibits the waters ability to form ice crystals at the normal freezing temperature.
How cold does water have to be to freeze in kelvins?
It depends on the pressure. At normal atmospheric pressure, the melting point of water is about 273.15 K.
Why doesn't achohol freeze?
It does, but its melting (and thus freezing) point is much lower than that of water so you can't actually freeze it in a regular freezer. To be precise, the melting point of ethanol is around -115 degrees Celsius or around -174 degrees Fahrenheit.
Why is the melting point of impure water lower than the melting point of pure water plus how can this be explained?
the melting point of IMPURE water is lower because excess chemicals and sediments (and whatever else making it impure) get in the way of the water freezing directly by making it so that when the the water froze, it also had to freeze the sediments and chemicals (or else it wouldn't be frozen)
Plus can you separate salt from water by freezing?
No, it can't be separated. The salt water would completely freeze with a change in melting point of solution.
What happens during the phase change to the water molecules in an ice cube when its removed from a freezer?
When we removed ice to freeze its molcule absorb heat which is present surrounding if heat is above melting point of it then its molcles keep distance between each other and act as a fuild,
Does water or juice freeze faster?
Nothing freezes "faster", they need different temperatures to freeze: even if you keep water at 2 degrees celsius for months, it won't freeze! However, since the melting point is the same as the freezing point, I'd have to say the answer to which freezes more easily is water since it contains no solutes which are considered impurities. Impurities lower the melting point of a substance, and therefore lower its freezing point, making it more difficult to reach the freezing point of Orange Juice than it is to reach the freezing point of water.
At what point does everything freeze?
The freezing point-Jillian
What takes longer ice melting or water freezing?
What takes longer to melt ice or freeze water?
