选择题 已知:
①NH3(g)+HCl(g)==NH4Cl(s) △H1=-176 kJ·mol-1
②NH3 (g![]()
600)makesmallpic(this,600,1800);\' style=\"VERTICAL-ALIGN: middle\" border=\"0\" src=\"http://www_php168_com/91files/2016060706/mcsv03yaveu.gif\">(aq) △H2=-35.1 kJ·mol-1
③HCl(g)![]()
600)makesmallpic(this,600,1800);\' style=\"VERTICAL-ALIGN: middle\" border=\"0\" src=\"http://www_php168_com/91files/2016060706/4kuugllsd1a.gif\">HCl(aq) △H3=-72. 3 kJ·mol-1
④NH3 (aq) +HCl(aq)==NH4Cl(aq) △H4=-52. 3 kJ·mol-1
⑤NH4Cl(s)![]()
600)makesmallpic(this,600,1800);\' style=\"VERTICAL-ALIGN: middle\" border=\"0\" src=\"http://www_php168_com/91files/2016060706/4kuugllsd1a.gif\">NH4Cl(aq) △H5
则第⑤个热化学方程式中△H5为 [ ???? ]
A. +16.3 kJ·mol-1
B. -16.3 kJ·mol-1
C. +335.7 kJ·mol-1
D. -335.7 kJ·mol-1
选择题 已知:
①NH3(g)+HCl(g)==NH4Cl(s) △H1=-176 kJ·mol-1
②NH3 (g![]()
600)makesmallpic(this,600,1800);\' style=\"VERTICAL-ALIGN: middle\" border=\"0\" src=\"http://www_php168_com/91files/2016060706/mcsv03yaveu.gif\">(aq) △H2=-35.1 kJ·mol-1
③HCl(g)![]()
600)makesmallpic(this,600,1800);\' style=\"VERTICAL-ALIGN: middle\" border=\"0\" src=\"http://www_php168_com/91files/2016060706/4kuugllsd1a.gif\">HCl(aq) △H3=-72. 3 kJ·mol-1
④NH3 (aq) +HCl(aq)==NH4Cl(aq) △H4=-52. 3 kJ·mol-1
⑤NH4Cl(s)![]()
600)makesmallpic(this,600,1800);\' style=\"VERTICAL-ALIGN: middle\" border=\"0\" src=\"http://www_php168_com/91files/2016060706/4kuugllsd1a.gif\">NH4Cl(aq) △H5
则第⑤个热化学方程式中△H5为 [???? ]
A. +16.3 kJ·mol-1
B. -16.3 kJ·mol-1
C. +335.7 kJ·mol-1
D. -335.7 kJ·mol-1
本题答案：A
本题解析：
本题所属考点：【反应热计算】
本题难易程度：【一般】
Other people\'s defects are good teachers. 别人的缺点就是自己的好老师.
