1g H2完全燃烧生成液态水放出142.9KJ热量,下列反应的热化学方程式正确的是( )
A.H2 + O2 = 2H2O△H= -571.6KJ/mol |
B.H2(g)+ 1/2O2(g)= H2O (l)△H= -142.9KJ/mol |
C.H2(g)+ 1/2O2(g)= H2O (l)△H= -285.8KJ/mol |
D.2H2(g)+ O2(g) = 2H2O (g)△H=" -571.6KJ/mol" |
1g H2完全燃烧生成液态水放出142.9KJ热量,下列反应的热化学方程式正确的是( )
A.H2 + O2 = 2H2O△H= -571.6KJ/mol |
B.H2(g)+ 1/2O2(g)= H2O (l)△H= -142.9KJ/mol |
C.H2(g)+ 1/2O2(g)= H2O (l)△H= -285.8KJ/mol |
D.2H2(g)+ O2(g) = 2H2O (g)△H=" -571.6KJ/mol" |