Arrange the following fatty acids from highest melting point to lowest melting point. CH_3(CH_2)_10COOH CH_3(CH_2)_16COOH CH_3CH_2 (CH=CHCH_2)_3 (CH_2)_6 COOH CH_3(CH_2)_7 CH=CH(CH_2)_7 COOH Select all of the statements about fatty acid melting points that are true. A saturated fatty acid with a greater molar mass has a higher melting point than a saturated fatty acid with a lower molar mass. A saturated fatty acid with a greater molar mass has a lower melting point than a saturated fatty acid with a lower molar mass. A saturated fatty acid has a higher melting point than an unsaturated fatty acid. A saturated fatty acid has a lower melting point than an unsaturated fatty acid.

The principle of melting point is that it increases with the increase in the molar mass of the fatty acid.

An unsaturated fatty acid has lower molar mass than saturated fatty acids.The reason being the tetrahedral molecular geometries of the saturated fatty acid allowing closer stacking or arrangement of molecules and intermolecular hydrogen bondings made possible.But in unsaturated fatty acid introduction of double bonds introduces bends in the molecular geometry with a cis configuration mostly,which do not allow for close packing or bonding ,hence easy separation of molecules on heating ,as less intermolecular bonds need to be broken

Highest melting point:CH₃(CH₂)₁₆COOH,CH₃(CH₂)₁₀COOH,CH3(CH2)7CH=CH(CH2)7COOH,

CH3CH2(CH=CHCH2)3(CH2)6COOH(lowest melting point ,many double bonds)

true statements:

A saturated fatty acid with a greater molar mass has a higher melting point than a saturated fatty acid with a lower molar mass.

A saturated fatty acid has a higher melting point than an unsaturated fatty acid.