28.(15分)乙醇是一种重要的化工原料和燃料,常见合成乙醇的途径如下:-|||-(1)乙烯气相直接水合法 _(2)(H)_(4)(g)+(H)_(2)O(g)=!=!= (C)_(2)(H)_(5)OH(g) Delta (H)_(1)=akJcdot (mol)^-1-|||-已知 _(2)(H)_(6)(g)+3(O)_(2)(g)=!=!= 2C(O)_(2)(g)+2(H)_(2)O(g) Delta (H)_(2)=-1322.0kJcdot (mol)^-1-|||-(H)_(3)C(H)_(2)OH(g)+3(O)_(2)(g)=!=!= C(O)_(2)(g)+3(H)_(2)O(g) Delta H=-1288.5kJcdot (mol)^-1-|||-则 a= __28.(15分)乙醇是一种重要的化工原料和燃料,常见合成乙醇的途径如下:-|||-(1)乙烯气相直接水合法 _(2)(H)_(4)(g)+(H)_(2)O(g)=!=!= (C)_(2)(H)_(5)OH(g) Delta (H)_(1)=akJcdot (mol)^-1-|||-已知 _(2)(H)_(6)(g)+3(O)_(2)(g)=!=!= 2C(O)_(2)(g)+2(H)_(2)O(g) Delta (H)_(2)=-1322.0kJcdot (mol)^-1-|||-(H)_(3)C(H)_(2)OH(g)+3(O)_(2)(g)=!=!= C(O)_(2)(g)+3(H)_(2)O(g) Delta H=-1288.5kJcdot (mol)^-1-|||-则 a= __