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【简答题】

如图是用苯做原料制备一系列化合物的转化关系图:(1)苯转化为A的化学方程式是______,其反应类型为______.(2)反应X的化学方程式为______.(3)有机物D在苯环上的二氯代物有______种同分异构体.(4)图中“苯-→E-→F”省略了反应条件,请写出E物质的结构简式______.

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举一反三

【单选题】已知1g火箭燃料肼(N2H4)气体燃烧生成N2和H2O(g)时,放出16.7kJ的热量,则该反应的热化学方程式正确的是( )

A.
N2H4+O2=N2+2H2O△H= —534.4kJ/mol
B.
N2H4(g)+ O2(g)=N2(g)+2H2O(g)△H = —16.7kJ/mol
C.
N2H4(g)+O2(g)=N2(g)+2H2O(l)△H = —534.4kJ/mol
D.
N2H4(g)+O2(g)=N2(g)+2H2O(g)△H = —534.4kJ/mol

【单选题】已知1 mol CH4气体完全燃烧生成气态CO2和液态H2O,放出890.3 kJ热量,则表示该反应的热化学方程式正确的是

A.
CH4(g) + 2O2(g) = CO2(g) + 2H2O(g) Δ H =+ 890.3 kJ · mol ˉ 1
B.
CH4(g) + 2O2(g) = CO2(g) + 2H2O(l) Δ H =- 890.3 kJ · mol ˉ 1
C.
CH4(g) + 2O2(g) = CO2(g) + 2H2O(l) Δ H =+ 890.3 kJ · mol ˉ 1
D.
CH4(g) + 2O2(g) = CO2(g) + 2H2O(g) Δ H =- 890.3 kJ · mol ˉ 1
相关题目:
【单选题】已知1g火箭燃料肼(N2H4)气体燃烧生成N2和H2O(g)时,放出16.7kJ的热量,则该反应的热化学方程式正确的是( )
A.
N2H4+O2=N2+2H2O△H= —534.4kJ/mol
B.
N2H4(g)+ O2(g)=N2(g)+2H2O(g)△H = —16.7kJ/mol
C.
N2H4(g)+O2(g)=N2(g)+2H2O(l)△H = —534.4kJ/mol
D.
N2H4(g)+O2(g)=N2(g)+2H2O(g)△H = —534.4kJ/mol
【单选题】已知1 mol CH4气体完全燃烧生成气态CO2和液态H2O,放出890.3 kJ热量,则表示该反应的热化学方程式正确的是
A.
CH4(g) + 2O2(g) = CO2(g) + 2H2O(g) Δ H =+ 890.3 kJ · mol ˉ 1
B.
CH4(g) + 2O2(g) = CO2(g) + 2H2O(l) Δ H =- 890.3 kJ · mol ˉ 1
C.
CH4(g) + 2O2(g) = CO2(g) + 2H2O(l) Δ H =+ 890.3 kJ · mol ˉ 1
D.
CH4(g) + 2O2(g) = CO2(g) + 2H2O(g) Δ H =- 890.3 kJ · mol ˉ 1