C.CH4(g)+202(g)ㄔCO2(g)+2H20(1) ,△H=一890kJ?mol-1D. CH4(g)+02(g)ㄔ C02(g)+H2O(1) ,△H= - 890kJ?mol-1 查看更多

 

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已知25 ℃、101 kPa下,碳、氫氣、甲烷和葡萄糖的燃燒熱依次是393.5 kJ·mol-1、285.8 kJ·mol-1、890.3 kJ·mol-1、2 800 kJ·mol-1,則熱化學方程式正確的是(   )

A.C(s)+1/2O2(g)====CO(g) ΔH=-393.5 kJ·mol-1

B.2H2(g)+O2(g)====2H2O(g) ΔH=+571.6 kJ·mol-1

C.CH4(g)+2O2(g)====2H2O(g)+CO2(g) ΔH=-890.3 kJ·mol-1

D.1/2C6H12O6(s)+3O2(g)====3CO2(g)+3H2O(l) ΔH=-1 400 kJ·mol-1

 

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 25℃、101 kPa下,碳、氫氣、甲烷和葡萄糖的燃燒熱依次是393.5 kJ•mol-1、285.8 kJ•mol-1、890.3 kJ•mol-1、2 800 kJ•mol-1,則下列熱化學方程式正確的是(   )

A. C(s)+O2(g) ===CO(g) △H=-393.5 kJ•mol-1

B. 2H2(g)+O2(g) ===2H2O(g) △H=+571.6 kJ•mol-1

C. CH4(g)+2O2(g) === CO2(g)+2H2O(g) △H=-890.3 kJ•mol-1

D. C6H12O6(s)+3O2(g) ===3CO2(g) +3H2O(l) △H=-1 400 kJ•mol-1

 

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25℃、101 kPa下,碳、氫氣、甲烷和葡萄糖的燃燒熱依次是393.5 kJ•mol-1、285.8 kJ•mol-1、890.3 kJ•mol-1、2 800 kJ•mol-1,則下列熱化學方程式正確的是(   )

A. C(s)+1/2 O2(g) ===CO(g) △H=-393.5 kJ•mol-1

B. 2H2(g)+O2(g) ===2H2O(g) △H=+571.6 kJ•mol-1

C. CH4(g)+2O2(g) === CO2(g)+2H2O(g) △H=-890.3 kJ•mol-1

D. 1/2C6H12O6(s)+3O2(g) ===3CO2(g) +3H2O(l) △H=-1 400 kJ•mol-1

 

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25℃、101 kPa下,碳、氫氣、甲烷和葡萄糖的燃燒熱依次是393.5 kJ/mol、285.8 kJ/mol、890.3 kJ/mol、2 800 kJ/mol,則下列熱化學方程式正確的是                                                                                                      

A.C(s)+O2(g)=CO(g)  △H= -393.5 kJ/mol

B.2H2(g)+O2(g)=2H2O(g)  H=+571.6 kJ/mol

C.CH4(g)+2O2(g)=CO2(g)+2H2O(g)  H= -890.3 kJ/mol

D.C6H12O6(s)+3O2(g)=3CO2(g)+3H2O(l)  H= -1 400 kJ/mol

 

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25℃、101 kPa下,碳、氫氣、甲烷和葡萄糖的燃燒熱依次是393.5 kJ/mol、285.8 kJ/mol、890.3 kJ/mol、2 800 kJ/mol,則下列熱化學方程式正確的是

A. C(s)+O2(g)=CO(g);△H=-393.5 kJ/mol  

B. 2H2(g)+O2(g)=2H2O(g);△H=+571.6 kJ/mol

C. CH4(g)+2O2(g)=CO2(g)+2H2O(g);△H=-890.3 kJ/mol

D.C6H12O6(s)+3O2(g)=3CO2(g)+3H2O(l);△H=-1 400 kJ/mol

 

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