Question

At what temperature does pure water at standard pressure change from a solid to a liquid?

(a) 0°C (32°F)
(b) 100°C (212°F)
(c) -40°C (-40°F)
(d) 273°C (459°F)

Answer 1

At standard pressure, pure water changes from a solid to a liquid at 0°C (32°F), which is the melting point of ice.

Step-by-step explanation:

Pure water changes from a solid to a liquid at standard pressure and a temperature of 0°C (32°F). This transition is known as the melting point of ice to water. Under standard pressure (1 atm), when the temperature of ice rises to 0°C, it begins to melt and turn into liquid water. This property is consistent across all typical pressure conditions we experience in our daily lives on the Earth's surface.