Define latent heat of fusion of ice.

Explanation

**Step-by-Step Solution:**

1. **Definition of Latent Heat of Fusion**: The latent heat of fusion is defined as the amount of energy required to change a substance from solid to liquid at its melting point without changing its temperature.

**Hint**: Remember that "latent" refers to energy that is absorbed or released during a phase change without a temperature change.

2. **Specific Case of Ice**: In the case of ice, the latent heat of fusion refers specifically to the energy needed to convert ice (solid) at 0 degrees Celsius into water (liquid) at the same temperature of 0 degrees Celsius.

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