气相反应2NO + H<sub>2</sub><img src="https://nimg.ppkao.com/2019-05/tangling/2019051316393090223.jpg?sign=c19b6b6694c8933657a696aee4889367&t=62d5bbfc" />N<sub>2</sub>+H<sub>2</sub>O<sub>2</sub>进料时无惰性气体,NO与H<sub>2</sub>以1∶2摩尔比进料,则膨胀因子δ<sub>NO</sub>=()
A、–1
B、–1/2
C、1/2
D、1