1g H2完全燃烧生成液态水放出a KJ的热量,下列热化学方程式正确的是
A.H2(g)+ 1/2 02(g)= H2O(l)△H =-aKJ.mol-1 |
B.2H2(g) + O2(g) = 2H2O(l)△H =-4aKJ.mol-1 |
C.2H2(g) + O2(g) = 2H2O(l)△H =+4aKJ.mol-1 |
D.H2(g) + 1/2 O2(g) = H2O(g) △H =-2aKJ.mol-1 |
1g H2完全燃烧生成液态水放出a KJ的热量,下列热化学方程式正确的是
A.H2(g)+ 1/2 02(g)= H2O(l)△H =-aKJ.mol-1 |
B.2H2(g) + O2(g) = 2H2O(l)△H =-4aKJ.mol-1 |
C.2H2(g) + O2(g) = 2H2O(l)△H =+4aKJ.mol-1 |
D.H2(g) + 1/2 O2(g) = H2O(g) △H =-2aKJ.mol-1 |