Water has a much lower boiling point and viscosity than hexadecane. But, water is capable of...

Water has a much lower boiling point and viscosity than hexadecane. But, water is capable of hydrogen bonding and hexadecane does not… shouldn’t water have the higher boiling point and viscosity? Explain why this occurs.

Solutions

Expert Solution

Greater the strength of intermolecular forces, higher the boiling point and viscosity of the liquid.

Water can indeed participate in hydrogen bonding but it has a very low molecular mass of 18 amu.

Hexadecane C16H34, on the other hand, is a very large molecule. It has a molecular mass of 226.4 amu, more than 12 times that of water! Though it is non-polar, and has weak dispersion forces (weaker than hydrogen bonding), the large size and large surface area of the molecule results in a large magnitude of dispersion forces.

This is because the magnitude of dispersion forces depends directly on the molecular mass and surface area of the molecule.

Thus, due to high magnitude of attractive intermolecular forces, hexadecane has higher boiling point and viscosity than water.

queen_honey_blossom answered 1 year ago

Next > < Previous

Related Solutions

Why does H2S have a lower boiling point than H2Se? Why does H2O have a much...

Why does H2S have a lower boiling point than H2Se? Why does H2O have a much higher boiling point than H2S?

1) Water has a high boiling point and low freezing point, high self-cohesion, and lower density...

1) Water has a high boiling point and low freezing point, high self-cohesion, and lower density in the solid phase than in the liquid phase. All these properties can be attributed to ______________. the ability of water molecules to hydrogen bond with one another repulsion of hydrophobic (nonpolar) solutes by water molecules the ability of water molecules to form covalent bonds with one another the inability of water molecules to interact with amphipathic solutes 2) Based on your knowledge of...

The boiling point constant for water is 0.51 Kkg/mol. Calculate boiling point of water in a...

The boiling point constant for water is 0.51 Kkg/mol. Calculate boiling point of water in a solution gf 0.010 mol/kg of sugar and a solution of 0.010 mol/kg of NaCl.

20) The normal boiling point for H2Se is higher than the normal boiling point for H2S...

20) The normal boiling point for H2Se is higher than the normal boiling point for H2S . This can be explained by A) larger dipole-dipole forces for H2Se . B) larger dispersion forces for H2Se . C) larger hydrogen-bond forces for H2Se . D) larger dipole-dipole forces, larger dispersion forces, and larger hydrogen-bond forces for 21) Choose the substance with the lowest surface tension. A) CH3SH B) CH3CH2CH2CH3 C) C6H6 D) H2O E) (CH3)2CO 22) Which of the following statements...

Water has an unusually high specific heat, melting point, boiling point, and heat of vaporization as...

Water has an unusually high specific heat, melting point, boiling point, and heat of vaporization as compared to compounds of similar molar mass. Explain why. Please show all work with the correct answer. Thank you!!!!

How much heat is required? The Melting point of H2O(s) is Oc, the boiling point of...

How much heat is required? The Melting point of H2O(s) is Oc, the boiling point of H2O (l) is 100c, and H2O has the following thermodynamic data: Cm(H2O(l)) = 75.4 J/mol*C deltHfus = 6.01 kJ/mol Cm(H2O(g)) = 33.6 J/mol*C deltHvap = 40.67 kJ/mol How much heat is required to convert 25.0g of H2O(s) at 0c to H2O(g) at 115c?

what happens if the solvent that you use for crystallization has a higher boiling point than...

what happens if the solvent that you use for crystallization has a higher boiling point than the compound to be purified?

12.) Boiling point elevation- Given that the Kb for water is 0.51° C/m, calculate the boiling...

12.) Boiling point elevation- Given that the Kb for water is 0.51° C/m, calculate the boiling point of a solution containing 71.0 g of Na2SO4 dissolved in 350 g of water.

Ethanol has a normal boiling point of 78.3 degrees celcius. Why is the normal boiling point...

Ethanol has a normal boiling point of 78.3 degrees celcius. Why is the normal boiling point higher than methanol but lower than iso-propanol (Normal boiling point = 82.3, heat of vaporization = 45.4)? Would you expect the heat of vaporization of ethanol to follow the same trend? Explain. AND Calculate the heat of vaporixation of cyclohexane using the normal boiling point of 80.7 degrees celcius. The vapor pressure of cyclohexane at 25.0 degrees celcius is 0.132 atm.

A certain substance X has a normal boiling point of 101.5°C and a molar boiling point...

A certain substance X has a normal boiling point of 101.5°C and a molar boiling point elevation constant Kb = 1.49 °C/m. A solution is prepared by dissolving some urea (NH2)2CO in 200 g of X. This solution boils at 104.4°C. What is the mass of urea that was dissolved in the solution? A. 23.4 g B. 6.48 g C. 584 g D. 9.73 g E. 1.95 g Question 10 of 10 1.0 Points The normal freezing point of a...

Subjects