3.
在\(\rm{101 kPa}\)和\(\rm{25℃}\)时,有关反应的热化学方程式如下:
\(\rm{C(s)+1/2O_{2}(g)═CO(g)}\) \(\rm{ΔH_{1}=-110.5 kJ·mol^{-1}}\)
\(\rm{H_{2}(g)+1/2O_{2}(g)═H_{2}O(g)}\) \(\rm{ΔH_{2}=-241.7 kJ·mol^{-1}}\)
\(\rm{H_{2}(g)+1/2O_{2}(g)═H_{2}O(l)}\) \(\rm{ΔH_{3}=-285.8 kJ·mol^{-1}}\)
下列说法正确的是( )