Calculate the calorific value of sugar if its heat of combustion is `5645 kJ mol^(-1)`.

Explanation

To calculate the calorific value of sugar based on its heat of combustion, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Given Data:**
- Heat of combustion of sugar (sucrose, C₁₂H₂₂O₁₁) = 5645 kJ/mol
- Molar mass of sucrose = 342 g/mol
- We want to find the calorific value for 1 kg (1000 g) of sugar.
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