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
- 上一篇:CO2(g)的标准生成热等于()
- 下一篇:按通常规定,标准生成热为零的物质有()
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
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