Question

Lab Organic- Q5:
Here is the burning enthalpy of all the isomers with the molecular formula C4H8
i. Cyclobutane: -2721kj / mol
ii. 1- Butene: -2717kj / mol
iii. Cis-2-Butene: -2710kj / mol
iv. Trans-2-Butene: -2706kj / mol

a. Arrange the isomers according to increasing energy stability. (Please Explain)
b. Trans-2-Butene Hydrogenation is -115kj / mol Calculate the hydrogenation enthalpy of the other three isomers.
c. Write down a balanced equation for burning C4H8
d. Write down a balanced equation for hydrogenation of C4H8
e. Cyclobutane heating can lead to the ring opening and receiving 1-Butene. Calculate the expected dH for this reaction. Is the response endothermic or exothermic?

Answer 1