已知MNO(s)══MNO(s)+1/2O(g)△══134.8kJ/molMNO(s)+M(s)+1/2N(g)══2MNO(s)△══-250.1kJ/mol,则MNO(s)的△f为
A.115.3kJ/mol B.-115.3kJ/mol C.-519.7kJ/mol D.519.7kJ/mol正确答案C
已知MNO(s)══MNO(s)+1/2O(g)△══134.8kJ/molMNO(s)+M(s)+1/2N(g)══2MNO(s)△══-250.1kJ/mol,则MNO(s)的△f为
A.115.3kJ/mol B.-115.3kJ/mol C.-519.7kJ/mol D.519.7kJ/mol正确答案C