Thermochemistry

Question

The reaction that represents the standard enthalpy of formation for benzene (C6H6) is:

6 C(diamond) + 3 H2(g) → C6H6(l)   6 C(graphite) + 6 H(g) → C6H6(l)   C6H6(l) + 15/2 O2(g) → 6 CO2(g) + 3 H2O(g)   6 C(graphite) + 3 H2(g) → C6H6(l)   C6H6(l) →6 C(graphite) + 3 H2(g)

Comments

If these are 5 options that u have given answer would be 4

Exp.
Carbon should be in its elemental state. i.e Graphite (solid)
Talking of Hydrogen...its elemental state is H2 not H as its given in option 2
Thus correct one is 4
Hope it helps