If a man submits to a diet of 9500 kJ per day and expands energy in all forms to a total of 12000 kJ per day, what is the change in internal energy per day? If the energy lost was stored as sucrose (1632 kJ per 100 g), how many days should it take to lose 1 kg ? (Ignore water loss for this problem.)

Explanation

To solve the problem step by step, we will break it down into two parts: calculating the change in internal energy and determining how many days it will take to lose 1 kg of weight based on the energy stored in sucrose.

### Step 1: Calculate the Change in Internal Energy (ΔU)

1. **Identify the energy intake and expenditure**:
- Energy intake (diet) = 9500 kJ/day
- Energy expenditure = 12000 kJ/day

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