问题:
有关下列各组热化学方程式中关系说法正确的是
2H 2(g)+O 2(g)=2H 2O(g); △H 1= -Q 1kJ/mol
2H 2(g)+O 2(g)=2H 2O(1); △H 2= -Q 2kJ/mol
H 2(g)+1/2O 2(g)=H 2O(1);△H 3= -Q 3kJ/mol
A.△H1=△H2
B.△H1<△H2
C.Q1 >2Q3
D.△H1>2△H3
有关下列各组热化学方程式中关系说法正确的是
2H 2(g)+O 2(g)=2H 2O(g); △H 1= -Q 1kJ/mol
2H 2(g)+O 2(g)=2H 2O(1); △H 2= -Q 2kJ/mol
H 2(g)+1/2O 2(g)=H 2O(1);△H 3= -Q 3kJ/mol
2H 2(g)+O 2(g)=2H 2O(g); △H 1= -Q 1kJ/mol
2H 2(g)+O 2(g)=2H 2O(1); △H 2= -Q 2kJ/mol
H 2(g)+1/2O 2(g)=H 2O(1);△H 3= -Q 3kJ/mol
A.△H1=△H2 | B.△H1<△H2 | C.Q1 >2Q3 | D.△H1>2△H3 |
参考答案: