8.
在\(\rm{2L}\)密闭容器中,\(\rm{800℃}\)时反应\(\rm{2NO(g)+O_{2}(g)⇌2NO_{2}(g)}\)体系中,\(\rm{n(NO)}\)随时间的变化如下表:
时间\(\rm{(s)}\) | \(\rm{0}\) | \(\rm{1}\) | \(\rm{2}\) | \(\rm{3}\) | \(\rm{4}\) | \(\rm{5}\) |
\(\rm{n(NO)/mol}\) | \(\rm{0.020}\) | \(\rm{0.010}\) | \(\rm{0.008}\) | \(\rm{0.007}\) | \(\rm{0.007}\) | \(\rm{0.007}\) |
\(\rm{(1)A}\)点处,\(\rm{v(}\)正\(\rm{)}\)______\(\rm{v(}\)逆\(\rm{)}\),\(\rm{A}\)点正反应速率______\(\rm{B}\)点正反应速率\(\rm{(}\)用“大于”、“小于”或“等于”填空\(\rm{)}\).
\(\rm{(2)}\)如图中表示\(\rm{NO_{2}}\)的变化的曲线是______\(\rm{.}\)用\(\rm{O_{2}}\)表示从\(\rm{0~2s}\)内该反应的平均速率\(\rm{v=}\)______.
\(\rm{(3)}\)能使该反应的反应速率增大的是______.
\(\rm{a.}\)及时分离出\(\rm{NO_{2}}\)气体 \(\rm{b.}\)适当升高温度 \(\rm{c.}\)增大\(\rm{O_{2}}\)的浓度 \(\rm{d.}\)选择高效的催化剂
\(\rm{(4)}\)能说明该反应已达到平衡状态的是______.
\(\rm{a.2v(NO_{2})=v(O_{2})b.}\)容器内压强保持不变 \(\rm{c.v_{逆}(NO)=2v_{正}(O_{2})}\) \(\rm{d.}\)容器内密度保持不变