What temp does water change from a solid to a liqid?

Answer 1

I believe ice will start melting as soon as the temperature goes above 0 deg C.

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It also depends on the pressure. At 1 atm, it will start melting at 0.0 °C. But at a pressure of 2.2 GPa it won't melt until you get to almost 82 °C.

Answer 2

The boiling point of water is defined as 100 degrees Celsius or 212 degrees Fahrenheit at the normal standard barometric (air) pressure of 1 bar, which is equal to 30.05 inches of Hg (Mercury) or 14.7 pounds per square inch.

At normal atmospheric pressure water changes from a liquid to a gas called steam - or back from a gas to a liquid - at 100 degrees Celsius.

If heat energy is being decreased or removed, the water in the gaseous state will condense into water in a liquid state.

At normal temperatures on Earth, say from -40 to 120 degrees C, at certain atmospheric pressures water can exist simultaneously in all its 3 states: solid, liquid, gas.

Depending on the atmospheric pressure, the boiling point of water can be much lower, for instance it is often cited as 202 oF in Denver, Colorado, because of the city's altitude: 5,280 feet above sea level, or exactly a mile high.

Charts that give the boiling point of water vs altitude are based on the standard atmosphere (1 bar), but that means a very simple chart which is based only on the standard atmospheric pressure can be very inaccurate: if the actual barometric pressure happens to be different from a standard atmosphere, the actual boiling point of water will vary from what is stated in the charts.

For example: If you live in Denver and wish to calibrate your thermometer using boiling water as the standard, the charts will tell you the boiling point of water in Denver is 202°F but on a day when the barometric pressure in Denver happens to be 30.05 inches Hg, the correct boiling point for water will actually be 212 °F.

Water has its maximum density at 4 oC at normal atmospheric pressure. (1 bar.)

Answer 3

Water changes from a solid to a liquid at 0 degrees Celsius. This transition is known as melting.

Answer 4

The melting point of ice is at 0 0C.