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It only boils at 100 degrees Celsius because Anders Celsius chose the boiling point of water to be a reference point on his new metric scale. The freezing point of water was his other reference point.

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8y ago
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15y ago

Because Anders Celsius said so. He based his scale on a difference of 100 degrees between freezing and boiling. At 100 degrees Celsius water is boiling and at 0 degrees Celsius water is freezing.

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7y ago

When Anders Celsius created a temperature scale, he set 0 as the freezing point of water, and 100 as the boiling point. However, the boiling point of water is only 100 degrees on the Celsius scale, and at sea level. On the Fahrenheit scale, it is 212 degrees.

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9y ago

The Celsius scale was defined on the basis of the freezing point and the boiling point of water.

The Celsius scale was defined on the basis of the freezing point and the boiling point of water.

The Celsius scale was defined on the basis of the freezing point and the boiling point of water.

The Celsius scale was defined on the basis of the freezing point and the boiling point of water.

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14y ago

100C is defined as being the boiling point of water at sea level.

Same as 0C is defined as being the freezing point of pure water at sea level.

Nothing special about the numbers. It was just a sensible definition point.

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13y ago

Pure water boils at 100deg c becoz @ normal temperature and pressure(NTP) the boiling point of pure water is 100deg centigrade. the boiling point of pure water can only be altered if:

1.NTP changes,

2.if water is contaminated, or

3. with change of altitude.

eg,water boils at a higher temp if salt is added to water or if the water contains impurities. the boiling point even increases when a person is in a submarine, the boiling point decreses greatly when a person is on moon or on higher altitude like mt.everest

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16y ago

it is because Anders Celsius made 0oC the freezing point of water and 100oC the boiling point.

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7y ago

Tradition. That was the "standard" that Celsius used when defining his temperature scale.

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9y ago

The Celsius scale was defined on the basis of the freezing point and the boiling point of water.

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7y ago

Water boils at 100ºC if the atmospheric pressure is 1 atm. Otherwise, it can boil at higher or lower temperatures, depending on the atmospheric pressure.

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Q: Why does pure water boil at 100oc?
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