已知在25℃时:2C(s)+O2(g)=2CO(g)△H1=-222kJ/mol,2H2(g)+O2(g)=2H2O(g)△H2=-484kJ/mol, C(s)+O2(g)=CO2(g) △H3=-394kJ/mol,则25℃时,CO(g)+H2O(g)=CO2(g)+H2(g)的反应热△H4为( )
A.-82kJ/mol | B.-41kJ/mol | C.-312kJ/mol | D.+82kJ/mol |
已知在25℃时:2C(s)+O2(g)=2CO(g)△H1=-222kJ/mol,2H2(g)+O2(g)=2H2O(g)△H2=-484kJ/mol, C(s)+O2(g)=CO2(g) △H3=-394kJ/mol,则25℃时,CO(g)+H2O(g)=CO2(g)+H2(g)的反应热△H4为( )
A.-82kJ/mol | B.-41kJ/mol | C.-312kJ/mol | D.+82kJ/mol |