发布网友 发布时间:2024-03-06 13:01
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热心网友 时间:2024-04-02 20:25
已知下列热化学方程式:已知下列热化学方程式:①C(s)+O2(g)═CO2(g)△H1=-393.5kJ?mol-1②2CO(g)+O2(g)═2CO2(g)△H2=-566.0kJ?mol-1③2H2(g)+O2(g)═2H2O(l)△H3=-571.6kJ?mol-1依据盖斯定律①-②2-③2得到:C(S)+H2O(l )=CO (g)+H2(g)△H=+175.3 kJ?mol-1...
...+O2(g)═CO2(g);△H1=-393.5kJ?mol-1②H2(g)+1(1)已知①C(s)+O2(g)═CO2(g);△H1=-393.5kJ?mol-1②H2(g)+12O2(g)═H2O(g);△H2=-241.8kJ?mol-1③CO(g)+12O2(g)═CO2(g);△H3=-283.0kJ?mol-1,由盖斯定律可知①-②-③得:C(s)+H2O(g)?CO(g)+H2(g)△H,因此△H=△H1-△H2-△H3=...
...为:(1)C(s)+O2(g)=CO2(g)△H1=-393.5kJ/mol(2)CH3COOH(l)+2O2...已知:(1)C(s)+O2(g)=CO2(g)△H1=-393.5kJ/mol(2)CH3COOH(l)+2O2(g)=2CO2(g)+2H2O(l)△H2=-870.3kJ/mol(3)H2(g)+12O2(g)=H2O(l)△H3=-285.8kJ/mol根据盖斯定律,(1)×2+(3)×2-(2)得2C(s)+2H2(g)+O2(g)=CH3COOH(l)△H=-...
...C(s)+O 2 (g)===CO 2 (g) ΔH1=-393.5 kJ/mol (2)CH 3 COOH(l)+...B
已知如下两个热化学方程式 C(s) O2(g)===CO2(g);△H=-393.5kJ/mol 2H2...设C的物质的量为A,H2的物质的量为B。A+B=0.2 393.5A+241.8B=63.53 解方程组得:A=0.1 B=0.1
已知下列热化学方程式:①C(s)+O2(g)═CO2(g)△H=-393.5kJ/mol②CO...将方程式2×③+6×①-6×②得方程式4Fe(s)+3O2(g)═2Fe2O3(s),其反应热△H=2(-489.0kJ/mol)+6(-393.5kJ/mol)-6(-283.0kJ/mol)=-1641.0kJ/mol,故选A.
已知C(s)+O2(g)=CO2(g),△H=-393.5kJ?mol-1,H2+12O2=假设它们都是1g,则1gH2(g)放出的热量为285.82kJ;1gC(s)放出的热量为393.512kJ,欲得到相同的热量,需分别燃烧固体碳和氢气的质量比约利用物质的质量=Q393.512Q285.82=285.8×12393.5×2≈4.36:1,答:得相同热量时碳与氢气质量比为4.36:1....
...=CO2(g) △H=-393.5kJ·mol^-12H2(g)+O2(g)=2H2O(g)设碳粉xmol,则氢气为(0.2-x)mol,则C(s)+O2(g)═CO2(g)△H=-393.5kJ/mol1 393.5kJx 393.5xkJ2H2(g)+O2(g)═2H2O(g)△H=-483.6kJ/mol 2 483.6kJ(0.2-x)mol 241.8(0.2-x)kJ所以393.5xkJ+241.8(0.2-x)kJ=63.53kJ,解得x=0.1...
已知:①C(s)+O2(g)=CO2(g);△H=-393.5kJ?mol?1②2CO(g)+O2(g)=2CO2...已知①C(s)+O2(g)=CO2(g);△H=-393.5kJ?mol-1②2CO(g)+O2(g)=2CO2(g);△H=-566kJ?mol-1③TiO2(s)+2Cl2(g)=TiCl4(s)+O2(g);△H=+141kJ?mol-1TiO2和焦炭、氯气反应生成TiCl4和CO气体的化学方程式为:2C+TiO2+2Cl2═TiCl4+2CO,由盖斯定律可知2×①-...
...+O 2 (g)=CO 2 (g) △H 1 =-393.5 kJ·mol -1 ②2CO(g)+O 2 (g...2 (g)=2H 2 O(l) △H 3 =-571.6 kJ·mol -1 可知①-②÷2-③÷2即得到反应C(S)+H 2 O(l )=CO(g)+H 2 (g)所以该反应的反应热△H=-393.5 kJ·mol -1 +566.0 kJ·mol -1 ÷2+571.6 kJ·mol -1 ÷2=+175.3 kJ·mol -1 所以热化学方程式为C(S)+...