The table gives the heat of combustion of three different alcohols at 25°C - HSC - SSCE Chemistry - Question 15 - 2023 - Paper 1

To approximate the molar heat of combustion for propan-1-ol, we can take the average of the heats of combustion given in the table. The possible options highlight different ways to approach this average calculation.

The options include:

1. Summing all three available heats and dividing by 3.
2. Summing the heats of ethanol and butan-1-ol.
3. Averaging methanol and ethanol.
4. A different approach showing butan-1-ol as predominant.

Calculating option B directly: $29.67 + 36.11 = 65.78$

Since this represents the combination of ethanol and butan-1-ol, it forms the most relevant approximation for propan-1-ol based on the values provided.