已知在1×105Pa,298K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)+1/2O2(g) ΔH=+242kJ·mol-1 |
B.2H2(g)+O2(g)=2H2O(l) ΔH=-484kJ·mol-1 |
C.H2(g)+1/2O2(g)=H2O(g) ΔH=+242kJ·mol-1 |
D.2H2(g)+O2(g)=2H2O(g) ΔH=+484kJ·mol-1 |
相关知识点
已知在1×105Pa,298K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)+1/2O2(g) ΔH=+242kJ·mol-1 |
B.2H2(g)+O2(g)=2H2O(l) ΔH=-484kJ·mol-1 |
C.H2(g)+1/2O2(g)=H2O(g) ΔH=+242kJ·mol-1 |
D.2H2(g)+O2(g)=2H2O(g) ΔH=+484kJ·mol-1 |