You are writing energy balances for a compound for which you cannot find heat capacity or latent heat data. All you know about the material are its molecular formula (C7H12N) and that it is a liquid at room temperature and has a normal boiling point of 200°C. Use this information to estimate the enthalpy of the vapor of this substance at 200°C relative to the liquid at 25°C.

Explanation:

Given that:

The molecular formula =

The normal boiling point =  200°C

The enthalpy of the vapor = 200°C

The liquid temperature = 25°C.

By applying Kopp's rule:

= 0.32 kJ/mole

For Trouton's rule;

ΔHV = 0.088 Tb(t) for non polar liquid

ΔHV = 0.088(200)°C

ΔHV = 0.088(200+ 273.15)

ΔHV = 41.637 kJ/mol

ΔHV ≅ 41.637 kJ/mol

∴

Replacing the values from above; we have:

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