At 1 atm of pressure and a temperature of 0°C, which phase(s) of H₂O can exist? A) ice and water B) ice and water vapor C) water only D) water vapor only E) ice only

Question

Quizplus · Accepted Answer

At 1 atm of pressure and a temperature of 0°C, the phase diagram of water shows that both ice and water can coexist in equilibrium. The presence of H₂O in the question refers to water, so ice and water are the two phases that can exist simultaneously under these conditions. Water vapor cannot exist under these conditions as the temperature is below the boiling point of water at atmospheric pressure.

At 1 Atm of Pressure and a Temperature of 0°C