Is the following a properly written thermochemical equation?

Question

2C8H18 + 25O2 → 16CO2 + 18H2O, ΔH = –5,471 kJ/mol


No, the equation does not list the enthalpy of reaction.

Yes, the equation is correct.

No, the equation does not list the states of each substance.

No, the equation is not balanced.

Answer 1

Properly written? Looks not so "proper" to me. Technically, it should have states of the compounds, otherwise, it is ok