【单选题】在恒容条件下有一定量的理想气体,当温度升高时,其热力学能将
【单选题】在恒容条件下化学反应:2SO 2 (g)+O 2 (g) 2SO 3 (g) ΔH='-Q' kJ·mol -1 。在上述条件下分别充入的气体和反应放出的热量(Q)如表所列: 根据以上数据,下列叙述正确的是( )
A.
在上述条件下反应生成1 mol SO 3 固体放热Q/2 kJ
【简答题】已知497°C时,恒容条件下,以压力为pθ的纯NO2为起始物进行反应:2NO2(g)= 2NO(g)+ O2(g),平衡时NO2的转化率为53.5%。(1)求 ;(2)仍在恒容条件下反应,欲使NO2的转化率达到60%,需改变系统容积为原来的多少倍?
【单选题】Earl was balancing himself on top of the fence when he lost his ______ and fell off.
【单选题】All flights because of the snowstorm, many passengers could do nothing but take the train .