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【简答题】

按要求写出下列反应的化学方程式:
(1)一氧化碳通过加热的氧化铜______;
(2)碳酸钠溶液和石灰水混合______;
(3)硫酸铜溶液中加入铁粉______;
(4)光合作用______.

参考答案:
参考解析:
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刷刷题刷刷变学霸
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