Hydrocarbons are nonpolar compounds containing carbon and hydrogen atoms. The properties of three hydrocarbons are summarized below. Methane CH4 Octane C8H18 Gasoline Liquid, BP: 126°C Eicosane CH3(CH2)18CH3 Lubricant (grease) Solid, MP: 37°C Natural Gas Gas, BP:-161°C a. Describe how the attractive forces between molecules change in the transition from substance changing from a solid to a liquid and then from a liquid to a gas. Solid to liquid: Liquid to gas: b. Based on the properties of the compounds in the provided table, which substance has the strongest attractive forces and how can you tell? Which substance has the weakest attractive forces and how can you tell? Strongest attractive forces: Weakest attractive forces: c. Which type of intermolecular force exists between each of the molecules for each of the compounds in the provided table? Methane: Octane: Eicosane: Write a general statement describing how the size of a molecule influences the strength of the intermolecular forces between molecules