Why is entropy of substance taken as zero at absolute zero of temperature?

Explanation

### Step-by-Step Solution:

1. **Understanding Entropy**:
- Entropy is a measure of the disorder or randomness in a system. Higher entropy indicates more disorder, while lower entropy indicates more order.

2. **Concept of Absolute Zero**:
- Absolute zero is defined as 0 Kelvin (or -273.15 degrees Celsius). At this temperature, a system is expected to reach its lowest energy state.

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