Two well-known gas phase reactions take place in the dehydration of ethane: C2H6  C2H4 + H2 (a)

C2H6 + H2  2CH4 (b)

Given the product distribution measured in the gas phase reaction of C2H6 as follows:

C2H6 27%

C2H4 33%

H2 13%

CH4 27%

a. What species was the limiting reactant?

b. What species was the excess reactant?

c. What was the conversion of C2H6 to CH4?

d. What was the degree of completion of the reaction?

e. What was the selectivity of C2H4 relative to CH4?

f. What was the yield of C2H4 expressed in kilogram moles of C2H4 produced per kilogram mole of C2H6?

g. What was the extent of reaction of C2H6?

vanderwaal's forces of attraction are the electrostatic intermolecular forces that exist in a molecule due to the temporary or permanent dipoles that are developed in a molecule. in , the major intermolecular forces are dipole-dipole interactions as the molecule is polar (bent structure). so the vanderwaal's forces of interaction in between molecules are the permanent dipole-dipole interactions that develop due to the dipole that exists in between the polar h - s bond. the positively charged hydrogen atom is attracted towards the negative end of the dipole that is sulfur of the adjacent molecule. therefore, these forces of attraction are relatively stronger than that of london dispersion forces that exist in non polar molecules.

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