Solution Found!
Answer: Acetylene (C2H2) and benzene (C6H6) have the same
Chapter 6, Problem 125P(choose chapter or problem)
Acetylene \(\left(\mathrm{C}_{2} \mathrm{H}_{2}\right)\) and benzene \(\left(C_{6} H_{6}\right)\) have the same empirical formula. In fact, benzene can be made from acetylene as follows:
\(3 \mathrm{C}_{2} \mathrm{H}_{2}(g) \rightarrow \mathrm{C}_{6} \mathrm{H}_{6}(l)\)
The enthalpies of combustion for \(\mathrm{C}_{2} \mathrm{H}_{2}\) and \(C_{6} H_{6}\) are - 1299.4 kJ/mol and -3267.4 kJ/mol, respectively. Calculate the standard enthalpies of formation of \(\mathrm{C}_{2} \mathrm{H}_{2}\) and \(C_{6} H_{6}\) and hence the enthalpy change for the formation of \(C_{6} H_{6}\) from \(\mathrm{C}_{2} \mathrm{H}_{2}\).
Questions & Answers
QUESTION:
Acetylene \(\left(\mathrm{C}_{2} \mathrm{H}_{2}\right)\) and benzene \(\left(C_{6} H_{6}\right)\) have the same empirical formula. In fact, benzene can be made from acetylene as follows:
\(3 \mathrm{C}_{2} \mathrm{H}_{2}(g) \rightarrow \mathrm{C}_{6} \mathrm{H}_{6}(l)\)
The enthalpies of combustion for \(\mathrm{C}_{2} \mathrm{H}_{2}\) and \(C_{6} H_{6}\) are - 1299.4 kJ/mol and -3267.4 kJ/mol, respectively. Calculate the standard enthalpies of formation of \(\mathrm{C}_{2} \mathrm{H}_{2}\) and \(C_{6} H_{6}\) and hence the enthalpy change for the formation of \(C_{6} H_{6}\) from \(\mathrm{C}_{2} \mathrm{H}_{2}\).
ANSWER:Step 1 of 5
The combustion reaction of acetylene is as follows;
