1. Problem: Identify the phases of water at 0°C and 1 atm pressure. 2. Formula and rules: Water freezes at 0°C at 1 atm, so at this temperature and pressure, water can coexist as solid (ice) and liquid. 3. Intermediate work: Since temperature is exactly at freezing point, phase equilibrium occurs. 4. Explanation: At 0°C and 1 atm, water is at its melting/freezing point, so both ice and liquid water phases are present. 5. Final answer: Solid (ice) and liquid water coexist at 0°C and 1 atm. --- Desmos field is minimal as no graph requested. "slug": "phase water", "subject": "chemistry", "desmos": {"latex": "", "features": {"intercepts": false, "extrema": false}}, "q_count": 5