已知2H2(g)+ O2(g)=2H2O(g) △H= ─484KJ/moL,则反应H2O(g)= H2(g)+ O2(g) 的△H为
A.─484kJ/mol | B.+484kJ/mol | C.─242kJ/mol | D.+242kJ/mol |
已知2H2(g)+ O2(g)=2H2O(g) △H= ─484KJ/moL,则反应H2O(g)= H2(g)+ O2(g) 的△H为
A.─484kJ/mol | B.+484kJ/mol | C.─242kJ/mol | D.+242kJ/mol |
试题篮
()