4F2g的精選

問題詳情：根據鍵能估算反應CH4(g)＋4F2(g)＝CF4(g)＋4HF(g)的反應熱ΔH爲（   ）化學鍵C—HC—FH—FF—F鍵能/（kJ·mol－1）414489565155A．–1940kJ·mol－1                 B．1940kJ·mol－1 C．–485kJ·mol－1    ...