试题与答案

依据叙述,写出下列反应的热化学方程式。 (1)用NA表示阿伏加德罗常数,在C2H

题型:选择题

题目:

依据叙述,写出下列反应的热化学方程式。

(1)用NA表示阿伏加德罗常数,在C2H2(气态)完全燃烧生成CO2和液态水的反应中,每有4NA个电子转移时,放出450 kJ的热量。其热化学方程式为______________________。

(2)已知拆开1 mol H—H键、1 mol N—H键、1 mol N≡N键分别需要的能量是436 kJ、395 kJ、940 kJ,则N2与H2反应生成NH3的热化学方程式为____________________________。

(3)钛(Ti)被称为继铁、铝之后的第三金属,已知由金红石(TiO2)制取单质Ti,涉及的步骤为:

已知:①C(s)+O2(g) CO2(g);  ΔH=-395.5 kJ·mol-1

②2CO(g)+O2(g) 2CO2(g);  ΔH=-560 kJ·mol-1

③TiO2(s)+2Cl2(g)+2C(s) TiCl4(s)+2CO(g)的ΔH=―80kJ/mol        

则TiO2(s)与Cl2(g)反应的热化学方程式为                              

答案:

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