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已知C(石墨+O2(g)=CO2(g)、ΔfHθm=-393.5KJ.mol-1、C(金刚石+O2(g)=CO2(g)、ΔfHθm=-395.8KJ.mol-1则:C(石墨)C(金刚石)的ΔrHθm等于()
- A、–789.3KJ.mol-1
- B、2.3KJ.mol-1
- C、–2.3KJ.mol-1
- D、789.3KJ.mol-1
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