\(\rm{900 ℃}\)时,向\(\rm{2.0 L}\)恒容密闭容器中充入\(\rm{0.40 mol}\)乙苯,发生反应:\(\rm{+H_{2}(g)}\) \(\rm{ΔH=a kJ·mol^{-1}}\)。经一段时间后达到平衡。反应过程中测定的部分数据见下表:
时间\(\rm{/min}\)
\(\rm{0}\)
\(\rm{10}\)
\(\rm{20}\)
\(\rm{30}\)
\(\rm{40}\)
\(\rm{n(}\)乙苯\(\rm{)/mol}\)
\(\rm{0.40}\)
\(\rm{0.30}\)
\(\rm{0.24}\)
\(\rm{n_{2}}\)
\(\rm{n_{3}}\)
\(\rm{n(}\)苯乙烯\(\rm{)/mol}\)
\(\rm{0.00}\)
\(\rm{0.10}\)
\(\rm{n_{1}}\)
\(\rm{0.20}\)
下列说法正确的是\(\rm{(}\) \(\rm{)}\)
进入组卷