白磷与氧气可发生如下反应:P4+5O2=P4O10已知断裂下列化学键需要吸收

白磷与氧气可发生如下反应: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-1P—O b kJ·mol-1P=O c kJ·mol-1O=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ΔH,其中正确的是(   )

 

A (4c+12b-6a-5d) kJ·mol-1    B (6a+5d-4c-12b) kJ·mol-1

C (4c+12b-4a-5d) kJ·mol-1    D (4c+5d-4a-12b) kJ·mol-1

答案

【答案】B

相关题目

There are a number of different ways to study a language, each of which has adv
There are a number of different ways to study a language, each of which has advantages and disadvantages. You may find a combination of these is a best choice for you. If you can find a course in t
---Was Tom in the chemistry lab when you arrived there? ---Yes, but he _____ soo
---Was Tom in the chemistry lab when you arrived there? ---Yes, but he _____ soon afterwards. A.had left     B.left    C.would leave             D.has left
punish, approach, represent, nod, express, yawn, introduce, avoid, misunderstand
punish, approach, represent, nod, express, yawn, introduce, avoid, misunderstand, touch 76. Stop ______ and go to bed if you’re tired. 77. He ______ by his father for telling lies yesterday. 78.
25℃时,在pH=13的溶液中可以大量共存的离子组是        
25℃时,在pH=13的溶液中可以大量共存的离子组是                        A.K+、Na+、HCO3-、NO3-                   B.Na+、K+、SO42-、Cl
如图,对称轴平行于y轴的抛物线与x轴交于(1,0),(3,0
如图,对称轴平行于y轴的抛物线与x轴交于(1,0),(3,0)两点,則它的对称轴为            .
下列关于基因工程的叙述,正确的是 A.基因工程经常以抗生
下列关于基因工程的叙述,正确的是 A.基因工程经常以抗生素抗性基因为目的基因 B.细菌质粒是基因工程常用的运载体 C.通常用一种限制性核酸内
下列各图反映的重大历史活动,哪些是专制决策的结果( 
下列各图反映的重大历史活动,哪些是专制决策的结果(  )       ①长城 ②大运河 ③十三行④票号A.①②③    B.①②③④      C.①②④
今年“两会”期间,网络媒体开通了“我有问题问总理”、
今年“两会”期间,网络媒体开通了“我有问题问总理”、“我向总理献一策”等栏目,上百万网民踊跃参与,各种提问和建言多达数万条。网络民意

最新题目