5.
接触法制硫酸工艺三个步骤中的热化学方程式如下:
\(\rm{①4FeS_{2}(s)+11O_{2}(g)=2Fe_{2}O_{3}(s)+8SO_{2}(g)}\) \(\rm{Δ}\)\(\rm{H}\)\(\rm{{\,\!}_{1}=—3412 kJ·mol^{-1}}\)
\(\rm{②2SO_{2}(g)+O_{2}(g)=2SO_{3}(g)}\) \(\rm{Δ}\)\(\rm{H}\)\(\rm{{\,\!}_{2}=—196.6 kJ·mol^{-1}}\)
\(\rm{③SO_{3}(g)+H_{2}O(l)=H_{2}SO(l)}\) \(\rm{Δ}\)\(\rm{H}\)\(\rm{{\,\!}_{3}=—130.3 kJ·mol^{-1}}\)