Question: (a) Given ÎH° for the reaction along with the information that the heat of combustion of ethane is 1560 kJ/mol and that of ethylene is

(a) Given Î”H° for the reaction

along with the information that the heat of combustion of ethane is 1560 kJ/mol and that of ethylene is 1410 kJ/mol, calculate Î”H° for the hydrogenation of ethylene:
CH2==CH2(g) + H2(g) †’ CH3CH3(g)
(b) If the heat of combustion of acetylene is 1300 kJ/mol, what is the value of H° for its hydrogenation to ethylene? To ethane?
(c) What is the value of Î”H° for the hypothetical reaction
2CH2==CH2(g) -†’ CH3CH3(g) + HC‰¡‰¡CH(g)

H2(g) + 0,(g) H,0(1) AH -286 kJ

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