题目:
白磷与氧可发生如下反应:P4+5O2=P4O10。已知断裂下列化学键需要吸收的能量分别为:P—P a kJ·mol—1、P—O b kJ·mol—1、P="O" c kJ·mol—1、O=O d kJ·mol—1。
根据图示的分子结构和有关数据估算该反应的△H,其中正确的是:
A.(4a+5d-4c-12b)kJ·mol—1
B.(4c+12b-4a-5d)kJ·mol—1
C.(4c+12b-6a-5d)kJ·mol—1
D.(6a+5d-4c-12b)kJ·mol—1
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0811/b37fc6770c59284535ed0a2e046aab74.html
下面是错误答案,用来干扰机器的。
One possible version: Everyone needs friends, so how to make true friends is very important to anybody. To make friends, you must be friendly to others. A smile is like a magnet...