1. What is the Ice to Water Phase Change?

The ice to water phase change (melting) requires energy input without temperature change. This energy is called latent heat of fusion and is 334 kJ/kg for water at 0°C.

2. How Does the Calculator Work?

The calculator uses the phase change energy equation:

Where:

• \( Q \) — Energy required (Joules)
• \( m \) — Mass of ice (kg)
• \( L \) — Latent heat of fusion (J/kg)

Explanation: The equation calculates the energy needed to change ice at 0°C to water at 0°C without temperature change.

3. Importance of Phase Change Energy Calculation

Details: Understanding phase change energy is crucial for thermodynamics, climate science, and engineering applications involving heat transfer.

4. Using the Calculator

Tips: Enter mass in kilograms and latent heat in J/kg (default is 334,000 J/kg for water). All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Why doesn't temperature change during phase change?
A: The energy input is used to break molecular bonds rather than increase kinetic energy (temperature).

Q2: What's the latent heat of fusion for water?
A: Approximately 334,000 J/kg (or 334 kJ/kg) at standard pressure.

Q3: Does this include heating the water after melting?
A: No, this calculates only the phase change energy. Additional energy would be needed to raise the water temperature.

Q4: How does pressure affect the calculation?
A: At different pressures, the latent heat value changes slightly, but 334 kJ/kg is accurate for standard conditions.

Q5: Can this be used for other phase changes?
A: Yes, with the appropriate latent heat value for the specific substance and phase change.