_(2)(H)_(6)(g)=!=!= (C)_(2)(H)_(4)(g)+(H)_(2)(g) Delta (H)_(1)=+137kJcdot (mol)^-1-|||-Ⅱ. (O)_(2)(g)+(H)_(2)(g)=!=!= CO(g)+(H)_(2)O(g) Delta H=+42kJcdot (mol)^-1-|||-Ⅲ. _(2)(H)_(6)(g)+C(O)_(2)(g)=!=!= (C)_(2)(H)_(4)(g)+CO(g)+(H)_(2)O(g) Delta (H)_(5)-|||-①反应Ⅲ的 Delta (H)_(3)= __ cdot (mol)^-1-|||-②若在1273K、100kPa下,反应I达到平衡时,混合气体中C2H4、C22H6、H2的物质的量分别为-|||-0.047mol、0.006 mol、0.047 mol,则乙烯的分压 ((C)_(2)(H)_(4))= __ kPa;平衡常数 _(p)= kPa-|||-(Kp为以分压表示的平衡常数,计算结果保留1位小数)。-|||-③在恒温恒容的密闭容器中进行反应Ⅱ,能说明反应已达到平衡状态-|||-的是 __ (填序号)。-|||-a.压强不再随时间变化-|||-100-|||-80-|||-60-|||-20-|||-420 480 540 600 600 720 7-|||-甲 7840-|||-b.混合气体的密度不再随时间变化-|||-C. _(正)((H)_(2))=(V)_(UND)(CO)-|||-d.单位时间内断裂 =0 键的数目与断裂 H-O 键的数目相等-|||-④乙烷直接裂解以及与CO2耦合裂解可能发生的反应如下,各反应的-|||-平衡转化率(α)与温度(T)的关系如图甲所示。-|||-a. _(2)(H)_(6)leftharpoons (C)_(2)(H)_(4)+(H)_(2) b. _(2)(H)_(6)+C(O)_(2)leftharpoons (C)_(2)(H)_(4)+CO+(H)_(2)O-|||-c. _(2)(H)_(6)+2C(O)_(2)leftharpoons 4CO+3(H)_(2) d.(C)_(2)(H)_(6)+C(O)_(2)leftharpoons (C)_(2)(H)_(4)+2CO+2(H)_(2)+C(H)_(4)-|||-e. (C)_(2)(H)_(6)+9C(O)_(2)leftharpoons 14(C)_(2)(H)_(4)+12CO+12(H)_(2)+6(H)_(2)O+C(H)_(4) 太阳能电池-|||-下列说法正确的是 __ (填序号)。 乙烯-|||-a.600℃以下,反应a的趋势最大-|||-b.CO2和C2H6耦合裂解有利于提高乙烷的平衡转化率-|||-c.过量CO2和C2H 6耦合高温裂解,可较好地防止催化剂表面结炭 CO2→-|||-质子交换膜-|||-d.用合适的催化剂催化CO2和C2H6耦合裂解,可提高该反应的平衡常数 乙-|||-(2)以太阳能电池为电源,利用电解法也可实现CO2制备乙烯,其装置如图乙所示。电极a为电源-|||-的 __ (填"正极"或"负极"),生成乙烯的电极反应式为 __ _。