Organic Chemistry Answers

At high altitudes, the ambient air pressure can be significantly less than 1 bar, so water boils at a lower temperature than 100 C. What is the boiling point of water at an altitude where the ambient air pressure is 0.46 bar? The enthalpy of vaporization of water near its boiling point is 40.7 kJ/mol.

After swimming in a pool or lake, the air feels cool because heat is required to evaporate the water from our skin. How much heat is required to evaporate 28.8 g of water? The enthalpy of vaporization of water is 44.0 kJ/mol.

A molecule having a molar mass of 145.7 g/mol crystallizes to a cubic solid where each edge of the unit cell is 665.0 pm. Each unit cell contains 2 molecules. What is the bulk density of the crystal?

Explain why alcohols are soluble in water but hydrocarbons of the same size are not soluble in water. For example butanol is soluble but butane is not. Draw a diagram to aid in your explanation. (3 C)

Alcohols form H-bonds with wate

What is the name of the functional group that forms the link between the monomers? 

What type of polymerization reaction produces Kevlar®? Explain your answer.

Gasoline is a mixture that includes a blending of different sized hydrocarbons. The blend of gasoline available in the summer is different from the blend used in the winter. The temperature at which gasoline will vapourize (become a gas) is lower in the winter blend than in the summer blend, making it easier for the vehicles to start in colder weather. Which blender contains a greater amount of smaller hydrocarbons? Explain your answer?

An acid of molecular mass 104 contains 34.6 % carbon, 3.86 %

hydrogen and the rest is oxygen. Calculate the molecular

formula of the acid.

Mechanism for the conversion of maleic acid to maleic anhaydride

The electronic configuration of Fe atom is