标签：Inthefollowingreactions，whichΔrHmΘisequaltotheΔfHmΘ?A/N(g)+/H(g)=NH(g)BCaCO(s)=CaO(s)+CO(g)CNaOH(aq)+HCl(aq)=NaCl(aq)+HO(l)DCO(g)+/O(g)=CO(g)