已知在25℃、1.0×105Pa条件下,2mol氢气燃烧生成水蒸气放出484kJ热量,下列热化学方程式正确的是( )
A.H2O(g)==H2(g)+1/2 O2(g) ΔH=+242 kJ·mol-1 |
B.2H2(g)+O2(g)===2H2O(l) ΔH=-484kJ·mol-1 |
C.H2(g)+1/2 O2(g)==H2O(g) ΔH=+242kJ·mol-1 |
D.2H2(g)+O2(g)==2H2O(g) ΔH=+484 kJ·mol-1 |
已知在25℃、1.0×105Pa条件下,2mol氢气燃烧生成水蒸气放出484kJ热量,下列热化学方程式正确的是( )
A.H2O(g)==H2(g)+1/2 O2(g) ΔH=+242 kJ·mol-1 |
B.2H2(g)+O2(g)===2H2O(l) ΔH=-484kJ·mol-1 |
C.H2(g)+1/2 O2(g)==H2O(g) ΔH=+242kJ·mol-1 |
D.2H2(g)+O2(g)==2H2O(g) ΔH=+484 kJ·mol-1 |