4．
一定温度下，向\(\rm{10 mL 0.40 mol·L^{-1} H_{2}O_{2}}\)溶液中加入适量\(\rm{FeCl_{3}}\)溶液，不同时刻测得生成\(\rm{O_{2}}\)的体积\(\rm{(}\)已折算为标准状况\(\rm{)}\)如下表所示。
\(\rm{t / min}\) | \(\rm{0}\) | \(\rm{2}\) | \(\rm{4}\) | \(\rm{6}\) |
\(\rm{V(O_{2}) / mL}\) | \(\rm{0}\) | \(\rm{9.9}\) | \(\rm{17.2}\) | \(\rm{22.4}\) |
资料显示，反应分两步进行：\(\rm{①2Fe}\)\(\rm{{\,\!}^{3+}}\)\(\rm{+ H}\)\(\rm{{\,\!}_{2}}\)\(\rm{O}\)\(\rm{{\,\!}_{2}}\) \(\rm{=}\) \(\rm{2Fe}\)\(\rm{{\,\!}^{2+}}\)\(\rm{+O}\)\(\rm{{\,\!}_{2}}\)\(\rm{↑+2H}\)\(\rm{{\,\!}^{+}}\) ；\(\rm{② H}\)\(\rm{{\,\!}_{2}}\)\(\rm{O}\)\(\rm{{\,\!}_{2}}\)\(\rm{+ 2Fe}\)\(\rm{{\,\!}^{2+}}\)\(\rm{+2H}\)\(\rm{{\,\!}^{+}}\)\(\rm{=}\) \(\rm{2H}\)\(\rm{{\,\!}_{2}}\)\(\rm{O+2Fe}\)\(\rm{{\,\!}^{3+}}\)\(\rm{{\,\!}^{,}}\)反应过程中能量变化如图所示。下列说法不正确的是
