皮皮学，免费搜题
登录
搜题
【单选题】
在1200℃时，天然气脱硫工艺中会发生下列反应 ①H 2 S（g）+ O 2 (g)=SO 2 (g)+H 2 O(g) △H 1 ②2H 2 S(g)+SO 2 (g)=S 2 (g)+2H 2 O(g) △H 2 ③H 2 S(g)+O 2 (g)=S(g)+H 2 O(g) △H 3 ④ 2S(g) =S 2 (g) △H 4 则△H 4 的正确表达式为A.
△H 4 =（△H 1 +△H 2 -3△H 3 ）
B.
△H 4 =（3△H 3 -△H 1 -△H 2 ）
C.
△H 4 =（△H 1 +△H 2 -3△H 3 ）
D.
△H 4 =（△H 1 -△H 2 -3△H 3 ）
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】A．They might pay less tax. B．They might pay more tax. C．They might have fewer children. D．They might pay some amount of tax.
【简答题】A．It might increase airport capacity. B．It might lower property values. C．It might lead to effective modification of existing jet engines. D．It might cause more transportation costs to and from airpor...
【单选题】According to the text, if a person never forgot,______.
A.
he would survive best
B.
he would have a lot of trouble
C.
his ability to learn would be enhanced
D.
the evolution of memory would stop
【简答题】展示设计的发展共分为四个阶段分别是( )、( )、( )、( )。
【单选题】According to the passage, if a person never forgot.
A.
he would survive best
B.
he would have a lot of trouble
C.
his ability to learn would be enhanced
D.
the evolution of memory would stop
相关题目：