A、(1011)<sub>2sub> B、(1100)<sub>2sub> C、(1000)<sub>2sub> D、(1101)<sub>2sub>
A、有一可逆热机,如图所示,自高温热源t<sub>1sub>吸热,向低温热源t<sub>2sub>和t<sub>3sub>放热。
已知:t<sub>1sub>=727℃,t<sub>3sub>=127℃,Q<sub>1sub>=1000kJ,Q<sub>2sub>=300kJ,W=500kJ,求:
(1)Q<sub>3sub>=?
(2)可逆热机的热效率?
(3)热源温度t<sub>2sub>=?
A、V<sub>2sub>=110V,I<sub>2sub>=27.2A B、V<sub>2sub>=110V,I<sub>2sub>=6.8A C、V<sub>2sub>=220V,I<sub>2sub>=6.8A D、V<sub>2sub>=110V,I<sub>2sub>=13.6A E、V<sub>2sub>=440V,I<sub>2sub>=3.4A
A、1000K时,反应的△<sub>rsub>Gθ<sub>msub>=193797J·mol-1。现有与碳反应的气体,其中含有φ(CH<sub>4sub>)=0.10,φ(H<sub>2sub>)=0.80,φ(N<sub>2sub>)=0.10。
A、Q<sub>1sub>=2000KJ,Q<sub>2sub>=300KJ B、Q<sub>1sub>=1000KJ,W<sub>0sub>=900KJ C、Q<sub>1sub>=2000KJ,Q<sub>2sub>=400KJ D、Q<sub>2sub>=500KJ,W<sub>0sub>=1500KJ
A、F<sub>2sub>>Cl<sub>2sub>>Br<sub>2sub>>I<sub>2sub> B、Br<sub>2sub>>I<sub>2sub>>F<sub>2sub>>Cl<sub>2sub> C、Cl<sub>2sub>>F<sub>2sub>>I<sub>2sub>>Br<sub>2sub> D、I<sub>2sub>>Br<sub>2sub>>Cl<sub>2sub>>F<sub>2sub>
A、Cl<sub>2sub>〉F<sub>2sub>〉Br<sub>2sub>〉I<sub>2sub> B、F<sub>2sub>〉Cl<sub>2sub>〉Br<sub>2sub>〉I<sub>2sub> C、I<sub>2sub>〉Br<sub>2sub>〉Cl<sub>2sub>〉F<sub>2sub> D、Br<sub>2sub>〉I<sub>2sub>〉F<sub>2sub>〉Cl<sub>2sub>
A、CH<sub>4sub>、CO、C<sub>2sub>H<sub>4sub>、C<sub>2sub>H<sub>6sub> B、CH<sub>4sub>、CO、C<sub>2sub>H<sub>4sub>、C<sub>2sub>H<sub>6sub>、C<sub>2sub>H<sub>2sub> C、CH<sub>4sub>、C<sub>2sub>H<sub>2sub>、C<sub>2sub>H<sub>4sub>、C<sub>2sub>H<sub>6sub> D、CO、CO<sub>2sub>、H<sub>2sub>、CH<sub>4sub>、C<sub>2sub>H<sub>4sub>、C<sub>2sub>H<sub>6sub>