题目
题型:不详难度:来源:
N2(g)+2O2(g)=2NO2(g);△H=+67.7kJ/mol
N2H4(g)+O2(g)=N2(g)+2H2O(g);△H=-534kJ/mol
下列关于肼和NO2反应的热化学方程式中,正确的是( )
A.2N2H4(g)+2NO2(g)=3N2(g)+4H2O(l);△H=-1135.7 kJ/mol | ||||||
B.2N2H4(g)+2NO2(g)=3N2(g)+4H2O(g);△H=-1000.3 kJ/mol | ||||||
C.N2H4(g)+NO2(g)=N2(g)+2H2O(l);△H=-1135.7 kJ/mol | ||||||
D.2N2H4(g)+2NO2(g)=3N2(g)+4H2O(g);△H=-1135.7 kJ/mol | ||||||
广州亚运“潮流”火炬燃料是丙烯(C3H6),北京奥运会“祥云”火炬燃料是丙烷(C3H8)(1)丙烷脱氢可得丙烯. 已知:C3H8(g)═CH3CH=CH2 (g)+H2(g)△H1=124.2kJ•mol-1 CH3CH=CH2(g)═CH4(g)+HC≡CH(g)△H2=32.4kJ•mol-1 (1)则相同条件下,反应C3H8(g)═CH4(g)+HC≡CH(g)+H2(g)的△H=______kJ•mol-1. (2)以丙烷为燃料制作新型燃料电池,电池的正极通入O2和CO2,负极通入丙烷,电解质是熔融碳酸盐.电池反应方程式为______;放电时,CO32-移向电池的______(填“正”或“负”)极. | ||||||
已知H2(g)、C2H4(g)和C2H5OH(l)的燃烧热分别是285.8kJ•mol-1、1411.0kJ•mol-1和1366.8kJ•mol-1,则由C2H4(g)和H2O(l)反应生成C2H5OH(l)的△H为( )
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