Water is used in car radiators as coolant because

Options

A. having value of specific heat
B. high density
C. low surface tension
D. low density

Explanation

To answer the question "Water is used in car radiators as coolant because:", we can break down the reasoning step by step.

### Step-by-Step Solution:

1. **Understanding Specific Heat**:
- Specific heat is the amount of heat required to raise the temperature of a unit mass of a substance by one degree Celsius (or Kelvin). It is a measure of a substance's ability to absorb heat.

2. **Heat Absorption**:
- The heat absorbed by a substance is directly proportional to its specific heat. This means that substances with higher specific heat can absorb more heat without experiencing a significant change in temperature.

3. **Water's Specific Heat**:
- Water has a relatively high specific heat capacity (approximately 4.18 J/g°C). This means it can absorb a large amount of heat energy before its temperature rises significantly.

4. **Application in Car Radiators**:
- In car engines, a lot of heat is generated during operation. To prevent the engine from overheating, a coolant is needed to absorb this excess heat.
- Water, due to its high specific heat, is effective in absorbing and carrying away this heat from the engine to the radiator, where it can dissipate into the air.

5. **Conclusion**:
- Therefore, water is used in car radiators as a coolant because it has a high specific heat capacity, allowing it to absorb a large amount of heat without a significant increase in temperature, thus helping to maintain optimal engine temperature.

### Final Answer:
Water is used in car radiators as coolant because it has a high specific heat capacity, allowing it to absorb a large amount of heat from the engine without a significant increase in temperature.

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