ANS:D - Trouton's

Trouton's equation relates the latent heat of vaporization (Δ𝐻𝑣𝑎𝑝ΔHvap​) of a substance to its boiling point (𝑇𝑏Tb​). The equation is: Δ𝐻𝑣𝑎𝑝=𝑅𝑇𝑏ΔHvap​=RTb​ Where:

• 𝑅R is the gas constant
• 𝑇𝑏Tb​ is the boiling point

So, the correct answer is "Trouton's". Trouton's rule is an empirical relationship that provides a simple way to estimate the latent heat of vaporization (Δ𝐻𝑣𝑎𝑝ΔHvap​) of a liquid based on its boiling point (𝑇𝑏Tb​). It states that for many substances, the ratio of the latent heat of vaporization to the boiling point temperature is approximately constant. Mathematically, Trouton's rule is expressed as: Δ𝐻𝑣𝑎𝑝=𝑅𝑇𝑏ΔHvap​=RTb​ Where:

• Δ𝐻𝑣𝑎𝑝ΔHvap​ is the latent heat of vaporization (in joules per mole or any other appropriate unit)
• 𝑅R is the gas constant (in joules per mole per Kelvin, 𝑅≈8.314 J/mol⋅KR≈8.314J/mol⋅K)
• 𝑇𝑏Tb​ is the boiling point temperature (in Kelvin)

Trouton's rule is particularly useful for estimating the latent heat of vaporization when experimental data is not available. It applies well to many organic liquids, especially those with relatively simple molecular structures and weak intermolecular forces. However, it's important to note that Trouton's rule is an approximation and may not hold true for all substances, especially for liquids with complex molecular structures or strong intermolecular forces. Additionally, deviations from Trouton's rule may occur for substances that undergo significant structural changes upon vaporization or have unique chemical properties.