Manipulating Thermochemical?

The standard enthalpy change for the following reaction is -116 kJ at 298 K.
C(s,graphite) + H2(g) + 1/2 O2(g) H2CO(g) ΔH° = -116 kJ

What is the standard enthalpy change for the reaction at 298 K?
2 C(s,graphite) + 2 H2(g) + O2(g) 2 H2CO(g)
1 answer 1