Dusstion 3 (10 points) 1. Rank the following alkanes in order of increasing boil

Question

Dusstion 3 (10 points) 1. Rank the following alkanes in order of increasing boiling point n-hexane, 2,3-dimethylbutane, and 2-methylpentane. 2. Consider the equilibrium shown below. When one looks at the equilibrium where X - CH3 and the one where X- CH(CH3)2, how do the values of the equilibrium constants (Ks) compare? 3· The chlorination of methane to yield monochloromethane in the presence of light has the following characteristics. First propagation step: Activation Energy = + 17 kJ/mol, Standard Enthalpy-7 kJ/mol Second propagation step: Activation Energy + 4 kJ/mol, Standard Enthalpy =-110 kJ/mol a. Draw the reaction-energy diagram for the chlorination of methane labelling the reactants, products, activation energies, standard enthalpies, transition states and intermediates. Calculate the standard enthalpy for the overall reaction and label it on the graph. Is the overall reaction endothermic or exothermic? Why? b. Draw the structure of the transition state for the second propagation step. Is it product-like or reactant-like? Why? c.

Explanation / Answer

Q.1 boiling point order..higher the branch higher will be the boiling point hence boiling point in increase order

n-hexan<2-methylpentane<2,3 dimethylbutane

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