Which of the following statement about thermochemistry is incorrect?

While balancing a thermochemical equation,fractions can be used but it is not a necessary condition to use fractions while balancing ;2H2g+O2g→2H2Ol; ∆H=-572 kJ....1 ; H2g+12O2g→H2Ol; ∆H=-286 kJ....2 ; Both are thermochemical equations;