\(\rm{800℃}\)时,在\(\rm{2L}\)密闭容器中发生反应\(\rm{2NO(g)+O_{2}(g)⇌2NO_{2}(g)}\),在反应体系中,\(\rm{n(NO)}\)随时间的变化如表所示:
时间\(\rm{(s)}\) | \(\rm{0}\) | \(\rm{1}\) | \(\rm{2}\) | \(\rm{3}\) | \(\rm{4}\) | \(\rm{5}\) |
\(\rm{n(NO)(mol)}\) | \(\rm{0.020}\) | \(\rm{0.010}\) | \(\rm{0.008}\) | \(\rm{0.007}\) | \(\rm{0.007}\) | \(\rm{0.007}\) |
\(\rm{①}\)图中表示\(\rm{NO_{2}}\)变化的曲线是 ______ ,用\(\rm{O_{2}}\)表示从\(\rm{0~2s}\)内该反应的平均速率\(\rm{v=}\) ______ .
\(\rm{②}\)能说明该反应已经达到平衡状态的是 ______
\(\rm{a.v(NO_{2})=2v(O_{2})}\)
\(\rm{b.}\)容器内压强保持不变
\(\rm{c.v_{逆}(NO)=2v_{正}(O_{2})}\)
\(\rm{d.}\)容器内的密度保持不变.