Water is a bad conductor of heat.

Answer

**Step-by-Step Text Solution:**

1. **Understanding Conductivity**: To determine if water is a good or bad conductor of heat, we first need to understand what thermal conductivity means. Thermal conductivity refers to the ability of a material to conduct heat.

2. **Role of Free Electrons**: In materials, heat is conducted through the movement of particles. In metals, this is primarily due to the presence of free electrons that can move easily and transfer energy. The more free electrons a material has, the better it can conduct heat.

3. **Water's Electron Mobility**: Water is a molecular compound and does not have free electrons like metals. Instead, it has a structure where the electrons are tightly bound to the molecules and are not free to move around. This means that water has fewer mobile electrons compared to metals.

4. **Conclusion**: Since water has a low density of free electrons and mobile ions, it cannot transfer heat efficiently. Therefore, we conclude that water is indeed a bad conductor of heat.

5. **Final Answer**: Yes, water is a bad conductor of heat.

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