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(1) Ba2++2OH-+2H++SO42-== BaSO4↓+2H2O , (2) Ba2+ +SO42-== BaSO4↓ . 查看更多

 

題目列表(包括答案和解析)

25℃,101 kPa時(shí),強(qiáng)酸與強(qiáng)堿的稀溶液發(fā)生中和反應(yīng)的中和熱為57.3 kJ·mol—1,辛烷的燃燒熱為5518 kJ·mol—1。下列熱化學(xué)方程式書寫正確的是

A.2H+(aq)+SO42—(aq)+Ba2+(aq)+2OH(aq)=BaSO4(s)+2H2O(1);H= —114.6 kJ·mol—1

B.KOH(aq)+H2SO4(aq)=K2SO4(aq)+H2O(1) ;H= —57.3 kJ·mol—1

C.C8H8(1) +O2(g)=8CO2(g)+9H2O(g);H= —5518 kJ·mol—1

D.2C8H18(g)+25O2(g)=16CO2 (g)+18H2O(1);H= —5518 kJ·mol—1

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25℃,101 k Pa時(shí),強(qiáng)酸與強(qiáng)堿的稀溶液發(fā)生中和反應(yīng)的中和熱為57.3kJ/mol,辛烷的燃燒熱為5518kJ/mol。下列熱化學(xué)方程式書寫正確的是(    )

A.2H+(aq)+SO42(aq)+Ba2+(aq)+2OH(aq)=BaSO4(s)+2H2O(1);ΔH=-57.3 kJ/mol

B.KOH(aq)+H2 SO4(aq)=K2SO4(aq)+H2O(l);ΔH=-57.3kJ/mol

C.2C8H18(g)+25O2(g)=16CO2(g)+18H2O(1);ΔH=-5518 kJ/mol

D.C8H18(l)+25/2 O2(g)=8CO2(g)+ 9H2O(1);ΔH=-5518 kJ/mol

 

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25℃,101 k Pa時(shí),強(qiáng)酸與強(qiáng)堿的稀溶液發(fā)生中和反應(yīng)的中和熱為57.3 kJ/mol,辛烷的燃燒熱為5518 kJ/mol。下列熱化學(xué)方程式書寫正確的是(    )

A.2H+(aq) +SO42(aq)+Ba2+(aq)+2OH(aq)=BaSO4(s)+2H2O(1);ΔH=-57.3 kJ/mol

B.KOH(aq)+ H2 SO4(aq)=K2SO4(aq)+H2O(l);ΔH=-57.3kJ/mol

C.2C8H18(g)+25O2(g)=16CO2(g)+18H2O(1);ΔH=-5518 kJ/mol

D.C8H18(l)+ 25/2 O2(g)=8CO2(g)+ 9H2O(1);ΔH=-5518 kJ/mol

 

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25℃,101 k Pa時(shí),強(qiáng)酸與強(qiáng)堿的稀溶液發(fā)生中和反應(yīng)的中和熱為57.3 kJ/mol,辛烷的燃燒熱為5518 kJ/mol。下列熱化學(xué)方程式書寫正確的是(   )

A.2H+(aq) +SO42(aq)+Ba2+(aq)+2OH(aq)=BaSO4(s)+2H2O(1);ΔH=-57.3 kJ/mol
B.KOH(aq)+H2 SO4(aq)=K2SO4(aq)+H2O(l);ΔH=-57.3kJ/mol
C.2C8H18(g)+25O2(g)=16CO2(g)+18H2O(1);ΔH=-5518 kJ/mol
D.C8H18(l)+ 25/2 O2(g)=8CO2(g)+ 9H2O(1);ΔH=-5518 kJ/mol

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25℃,101 k Pa時(shí),強(qiáng)酸與強(qiáng)堿的稀溶液發(fā)生中和反應(yīng)的中和熱為57.3 kJ/mol,辛烷的燃燒熱為5518 kJ/mol。下列熱化學(xué)方程式書寫正確的是(   )
A.2H+(aq) +SO42(aq)+Ba2+(aq)+2OH(aq)=BaSO4(s)+2H2O(1);ΔH=-57.3 kJ/mol
B.KOH(aq)+H2 SO4(aq)=K2SO4(aq)+H2O(l);ΔH=-57.3kJ/mol
C.2C8H18(g)+25O2(g)=16CO2(g)+18H2O(1);ΔH=-5518 kJ/mol
D.C8H18(l)+ 25/2 O2(g)=8CO2(g)+ 9H2O(1);ΔH=-5518 kJ/mol

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