ΔcHm?(石墨)=-393.7kJ/mol,ΔcHm?(金刚石)=-395.8kJ/mol,则反应C(石墨)=C(金刚石)的焓变应为()


ΔcHm?(石墨)=-393.7kJ/mol,ΔcHm?(金刚石)=-395.8kJ/mol,则反应C(石墨)=C(金刚石)的焓变应为()

A.-789.5kJ/mol

B.-2.1kJ/mol

C.+2.1kJ/mol

D.+789.5kJ/mol

正确答案:C


Tag:石墨 金刚石 时间:2022-05-20 16:00:57