When ethyne is passed through a red hot tube, then formation of benzene takes place: ΔH∘f(C2H2)(g)=230kJmol−1 H∘f(C6H6)(g)=85kJmol−1 Calculate the standard heat of trimerisation of ethyne to benzene. 3C2H2(g)→C6H6(g)
A
205kJmol−1
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
605kJmol−1
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
−605kJmol−1
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
205kJmol−1
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution
The correct option is C−605kJmol−1 ΔHreaction=ΔH∘f(c6H6)−3ΔH∘f(C2H2) =85−3(230) =−605kJmol−1.