On top of a mountain
Water can boil below 100 degrees Celsius depending on the area of the world. A lab was conducted in science class that our water boiled at 94.6 degrees Celsius. The average boiling point for water is 100 degrees Celsius but that does not mean it will always be that degree to boil.
Tap water typically boils at 100 degrees Celsius at standard atmospheric pressure. However, factors like altitude can affect the boiling point of water.
No, pure water boils at 100 degrees Celsius at normal temperature and pressure. The fact that the water boiled at 102 degrees Celsius indicates that it may not be pure and could contain impurities or dissolved substances.
Yes, ice melts at 0 degrees Celsius (32 degrees Fahrenheit) and boils at 100 degrees Celsius (212 degrees Fahrenheit at sea level). These are the specific temperatures at which the phase transitions occur for water.
At Zero degree Celsius.(or less)
The temperature of boiling water is 212 degrees Fahrenheit. This is 100 degrees Celsius. Water will freeze at 32 degrees Fahrenheit (0 degrees Celsius).
More dense than what? I presume you mean is it more dense at that temperature than at lower temperatures. The answer is no, it gets denser at lower temperatures, all the way down to 4 degrees centigrade. Then it gets less dense again.
9 degrees less than 0 degrees Celsius is -9 degrees Celsius.
As temperature increases, the ability for water to absorb CO2 decreases. That is why we see higher CO2 when temperature rises in our atmosphere.
9 degrees less than 2 degrees Celsius would be -7 degrees Celsius.
12 degrees less than 2 degrees Celsius is -10 degrees Celsius.
When the pressure is reduced. Water only boils at 100 degrees Celsius when the air pressure is one atmosphere. So up a mountain, where the air pressure is lowered, water boils at a lower temperature.