将20 g Ba(OH)2•8H2O固体与10 g NH4Cl晶体在烧杯中混合,不断搅拌。 (1)

20 g Ba(OH)2•8H2O固体与10 g NH4Cl晶体在烧杯中混合,不断搅拌。

(1) 实验现象为烧杯外壁______________,固体变成糊状,并有刺激性气体

放出。这个现象说明,Ba(OH)2•8H2O固体与NH4Cl晶体反应是_______(

吸热放热)反应

(2) 该化学反应中能量转化的主要形式是__________________________

(3) 该反应的化学方程式是:___________________________________

答案

(1) (冰冷)  (1)    吸热 (1)

(2) 热能转化为化学能 (1)

(3) Ba(OH)2•8H2O2NH4ClBaCl22NH3•H2O8H2O (2)

相关题目

那一张硬纸片让它快一些从一木梳子上划过,在让它从同一
那一张硬纸片让它快一些从一木梳子上划过,在让它从同一木梳子上慢一点划过,则两次所发出的声音   A、响度不同   B、音调不同      C、音色不
Whyshould the dragon have a different character in different parts of the world?
Whyshould the dragon have a different character in different parts of the world?Some experts believe it is due to the animals the myths grow out of.  
右图是模拟氯碱工业生产中检查氯气是否泄漏的装置,下列
右图是模拟氯碱工业生产中检查氯气是否泄漏的装置,下列有关说法错误的是   A.烧瓶中立即出现白烟   B.烧瓶中立即出现红棕色   C.烧瓶中发生
Here is something about Christmas. Every year just after Christmas the January
Here is something about Christmas. Every year just after Christmas the January Sales start. All the shops reduce their prices for two weeks, and they are full of people looking for bargains. My hus
 Please put these teaching materials in order and don’t leave them ______ a
 Please put these teaching materials in order and don’t leave them ______ a mess.     A. with            B. for                C. on              D. in
已知0<β<<α<π,且cos(α-)=,sin(-β)=,求cos(α+β)
已知0<β<<α<π,且cos(α-)=,sin(-β)=,求cos(α+β)的值.
与直线平行的抛物线的切线方程是        A.2xy+3=0     
与直线平行的抛物线的切线方程是        A.2xy+3=0                                              B.2xy3=0             C.2
 针对“电荒”局面,很多省市的有关部门采取了“错峰用电
 针对“电荒”局面,很多省市的有关部门采取了“错峰用电,峰谷电价”的措施,即用电低谷时降低电价,鼓励用电;用电高峰时调高电价,引导企业

最新题目