题目

Directions: Write an English composition in 120-150 words according to the instructions given below in Chinese. Cheating on Exams一次测验，课代表已分发了试卷，而老师因故晚到了几分钟，教室里乱作一团。请对以上情景进行描述，并谈谈你对于作弊的看法。_________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ 下列推断正确的是 A．由H+(aq)+OH-(aq)=H20（1）  △H=-57．3 kJ·mol-1，可知含1 mo1 CH3COOH的溶液与含1 mol NaOH的溶液混合，放出热量为57．3 kJ B．由C(石墨)=C(金刚石)  △H=+1．9 kJ·mol-1，可知石墨比金刚石更稳定 C．由N2(g)+3H2(g)=2NH3(g)  △H=-92．4 kJ·mol-1，可知将1 mol N2(g)和3 mol H2(g)置于密闭容器中充分反应后放出热量为92．4 kJ D．由△G＝△H-T△S可知，所有的放热反应都能自发进行