AP BIOLOGY

Detailed explanation-1: -The boiling point of any material is the temperature at which the material transitions from the liquid phase to the gas phase. For water, this occurs at 100 degrees Celsius. The Celsius scale was designed around the ice/water melting point and the liquid water/vapor boiling point.

Detailed explanation-2: -at 100 degree celcius, water exists in both the liquid state as well as in gaseous state. This is special condition because 100 degree celcius is the boiling point of water and as well as liquefaction temperature of the water vapour. Q.

Detailed explanation-3: -Similarly, if we heat a volume of water above 100 degrees Celsius, or 212 degrees Fahrenheit, water changes its phase into a gas called water vapor.

Detailed explanation-4: -At the boiling point, water transitions from its liquid to gas (vapor) state. Increasing the temperature above the boiling point, 212°F (100°C), causes water to change from liquid to gas (water vapor).

Detailed explanation-5: -The normal boiling point of water is 100oC because this is the temperature at which the vapor pressure of water is 760 mmHg, or 1 atm.