【单选题】下列反应中,熵减小(即ΔrSm < 0 )的是:
A.
2CO(g) + O2(g) = 2CO2(g)
B.
2NH4NO3(s) = 2N2(g) + 4H2O(g) + O2(g)
【单选题】下列反应中,熵减小的是
A.
(N (NH 4 ) 2 CO 3 (s) = NH 4 HCO 3 (s)+NH 3 (g)
B.
2N 2 O 5 (g) = 4NO 2 (g) + O 2 (g) H 4 ) 2 CO 3 (s) = NH 4 HCO 3 (s)+N
C.
MgCO 3 (s) = MgO(s) + CO 2 (g)
D.
2CO(g) = 2C(s) + O 2 (g)
【简答题】Listen and choose.(听老师读,选出正确的词语的序号填空。) ( )1. A. date ( )1. A. fall ( )1. A. swim ( )1. A. sleep ( )1. A. noon B. her B. which B. ninth B. winter B. usually C. always C. often C. be...
【单选题】海外旅行を ( )、お金と時間がなければ無理です。
【单选题】下列说法中,正确的是( )
A.
自发反应一定是熵增大,非自发反应一定是熵减小或不变
【单选题】What do many small business owners choose as the name for their business?
A.
They choose a name which explains what they do.
B.
They choose an important name.
C.
They try to get a clever name.
D.
They try to get an interesting name.
【简答题】Listen and choose. ( )1. A B ( )2. A B ( )3. A B ( )4. A B ( )5. A B
【单选题】以下不是物联网智能信息设备的发展趋势的是()