Heptane and octane form ideal solution. At 373 K, the vapour pressures of the two liquid components are 105.2 kPa and 46.8 kPa respectively. What will be the vapour pressure of a mixture of 26.0 g of heptane and 35 g of octane ?

Explanation

To solve the problem of finding the vapor pressure of a mixture of heptane and octane, we will follow these steps:

### Step 1: Calculate the number of moles of heptane and octane.
1. **Molecular weight of heptane (C7H16)**:
- Carbon (C) = 12.01 g/mol, Hydrogen (H) = 1.008 g/mol
- Molecular weight of heptane = (7 × 12.01) + (16 × 1.008) = 100.2 g/mol (approximately 100 g/mol).

**Moles of heptane**:
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