Write a letter to your friend Henry to congratulate him on his admission into the Biology Department of Beijing University as a postgraduate . I n your letter, you should express 1) your delight; 2) your comment;3) your wish .
【单选题】已知:298K时,反应 C (石墨) + O 2 ( g ) → CO 2 ( g ) ⊿ r H m Θ =- 393.5kJ ·mol -1 CO ( g ) + 1/2O 2 ( g ) → CO 2 ( g ) ⊿ r H m Θ =- 283.0kJ ·mol -1 则反应 C (石墨) + 1/2O 2 ( g ) → CO ( g )的 ⊿ r H m Θ 等于( )。