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【单选题】
航天飞船可用肼(N 2 H 4 )和过氧化氢(H 2 O 2 )为动力源.已知1 g液态肼和足量液态过氧化氢反应生成氮气和水蒸气时放出20 . 05 kJ的热量.下列说法中错误的是 [ ]A.
该反应中肼作还原剂
B.
液态肼的燃烧热为20 . 05 kJ·mol -1
C.
该动力源的突出优点之一是生成物对环境污染小
D.
肼和过氧化氢反应的热化学方程式为:N 2 H 4 (l)+2H 2 O 2 (l) N 2 (g)+4H 2 O(g) Δ H =-641 . 6 kJ·mol -1
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