9.
炽热的炉膛内有反应:\(\rm{C(s)+O_{2}(g)=CO_{2}(g)}\) \(\rm{ΔH=-392kJ·mol^{-1}}\),往炉膛内通水蒸气时,有反应:
\(\rm{C(s)+H_{2}O(g)=CO(g)+H_{2}(g)}\) \(\rm{ΔH=+131kJ·mol^{-1}}\),
\(\rm{2CO(g)+O_{2}(g)=2CO_{2}(g)}\) \(\rm{ΔH=-564kJ·mol^{-1}}\),
\(\rm{2H_{2}(g)+O_{2}(g)=2H_{2}O(g)}\) \(\rm{ΔH=-482kJ·mol^{-1}}\),
由以上反应推断往炽热的炉膛内通入水蒸气时,说法正确的是\(\rm{(}\) \(\rm{)}\)