Why do long chain fatty acids have higher melting points?

Long chain fatty acids posses more carbon atoms. The carbon atoms are bonded together thereby resulting more bonds. Melting is as a result of breaking these bonds. The longer the carbon chains the higher the molecular weight of t6he fatty acids hence more energy that comes from a higher temperature.

What fatty acid has the lowest melting point?

Unsaturated fatty acids have lower melting points than saturated fatty acids of the same length. For example, the melting point of stearic acid is 69.6°C, whereas that of oleic acid (which contains one cis double bond) is 13.4°C. The melting points of polyunsaturated fatty acids of the C18 series are even lower.
  • Do saturated fatty acids have double bonds?

    An unsaturated fat is a fat or fatty acid in which there is at least one double bond within the fatty acid chain. A fatty acid chain is monounsaturated if it contains one double bond, and polyunsaturated if it contains more than one double bond.
  • Are Triglycerides are carboxylic acids?

    Triacylglycerols (triglycerides) are carboxylic acids. Saturated fats have lower melting points than do unsaturated fats. Triacylglycerols (triglycerides) are composed of fatty acid residues and glycerol. Unsaturated fats are more likely than saturated fats to be liquid at room temperature.
  • How does the length of the carbon chain affect the boiling point?

    Size and properties of molecules. The size of a molecule has an effect on the properties that molecule shows. For example, the boiling point of hydrocarbons increases as the number of carbon atoms in the molecule increases. This is because forces between molecules increase as the size of the molecule increases.

What temperature does lauric acid freeze?

The freezing point of lauric acid is 44 °C, based on the plateau observed at this temperature on the graph. 6. Freezing point depression: 44 °C - 42 °C = 2 °C. exists as neither a liquid nor a solid.
  • Is the freezing point depression a linear function of molality?

    Note that the molal freezing point depression constant, Kf, has a specific value depending on the identity of the solvent. The following graph shows the normal freezing point for water (solvent) as a function of molality in several solutions containing sucrose (a non-volatile solute).
  • What is lauric acid and what is it used for?

    Lauric acid is a medium-length long-chain fatty acid, or lipid, that makes up about half of the fatty acids within coconut oil. It's a powerful substance that is sometimes extracted from the coconut for use in developing monolaurin.
  • What is the molecular weight of benzoic acid?

    Benzoic acid
    PubChem CID:243
    Chemical Names:Benzoic acid; 65-85-0; Benzenecarboxylic acid; Dracylic acid; Benzeneformic acid; Carboxybenzene More
    Molecular Formula:C7H6O2 or C6H5COOH
    Molecular Weight:122.123 g/mol

What is the melting point of stearic acid?

Stearic acid
AppearanceWhite solid
OdorPungent, oily
Density0.9408 g/cm3 (20 °C) 0.847 g/cm3 (70 °C)
Melting point69.3 °C (156.7 °F; 342.4 K)
  • Is magnesium stearate good?

    Myatt: Magnesium stearate is a simple salt made of two common nutritional substances, the mineral magnesium and the saturated fat stearic acid. It is used as a “flow agent” in many nutritional supplements and pharmaceuticals. Both magnesium and stearic acid are not only safe, they are beneficial to human health.
  • What does stearic acid do to the skin?

    Stearic acid also has important cleansing properties that make it useful in soaps. The ingredient acts as a surfactant, a substance that lowers the surface tension of oils. As a result, stearic acid helps to remove dirt, sweat and excess sebum from the skin and hair.
  • Are the melting and freezing points the same?

    So to sum this all up, when matter is transitioning from solid to liquid (melting) or liquid to solid (freezing), its temperature is fixed at the melting/freezing point, which is the same temperature.

Updated: 29th September 2018

Rate This Answer

4.3 / 5 based on 3 votes.