液态水到气态水能量变化的问题H2(g)+1/2O2(g)==H2O(g) △H=-241.8KJ/molH2(g)+1/2O2(g)==H2O(l) △H=-285.8KJ/molH2O(l)==H2O(g) △H=+44.0KJ/mol这个液态水转化成气态水 是吸热 我懂但是这个△H 该怎样算
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![液态水到气态水能量变化的问题H2(g)+1/2O2(g)==H2O(g) △H=-241.8KJ/molH2(g)+1/2O2(g)==H2O(l) △H=-285.8KJ/molH2O(l)==H2O(g) △H=+44.0KJ/mol这个液态水转化成气态水 是吸热 我懂但是这个△H 该怎样算](/uploads/image/z/2353567-31-7.jpg?t=%E6%B6%B2%E6%80%81%E6%B0%B4%E5%88%B0%E6%B0%94%E6%80%81%E6%B0%B4%E8%83%BD%E9%87%8F%E5%8F%98%E5%8C%96%E7%9A%84%E9%97%AE%E9%A2%98H2%28g%29%2B1%2F2O2%28g%29%3D%3DH2O%28g%29+%E2%96%B3H%3D-241.8KJ%2FmolH2%28g%29%2B1%2F2O2%28g%29%3D%3DH2O%28l%29+%E2%96%B3H%3D-285.8KJ%2FmolH2O%28l%29%3D%3DH2O%28g%29+%E2%96%B3H%3D%2B44.0KJ%2Fmol%E8%BF%99%E4%B8%AA%E6%B6%B2%E6%80%81%E6%B0%B4%E8%BD%AC%E5%8C%96%E6%88%90%E6%B0%94%E6%80%81%E6%B0%B4+%E6%98%AF%E5%90%B8%E7%83%AD+%E6%88%91%E6%87%82%E4%BD%86%E6%98%AF%E8%BF%99%E4%B8%AA%E2%96%B3H+%E8%AF%A5%E6%80%8E%E6%A0%B7%E7%AE%97)
液态水到气态水能量变化的问题H2(g)+1/2O2(g)==H2O(g) △H=-241.8KJ/molH2(g)+1/2O2(g)==H2O(l) △H=-285.8KJ/molH2O(l)==H2O(g) △H=+44.0KJ/mol这个液态水转化成气态水 是吸热 我懂但是这个△H 该怎样算
液态水到气态水能量变化的问题
H2(g)+1/2O2(g)==H2O(g) △H=-241.8KJ/mol
H2(g)+1/2O2(g)==H2O(l) △H=-285.8KJ/mol
H2O(l)==H2O(g) △H=+44.0KJ/mol
这个液态水转化成气态水 是吸热 我懂
但是这个△H 该怎样算
液态水到气态水能量变化的问题H2(g)+1/2O2(g)==H2O(g) △H=-241.8KJ/molH2(g)+1/2O2(g)==H2O(l) △H=-285.8KJ/molH2O(l)==H2O(g) △H=+44.0KJ/mol这个液态水转化成气态水 是吸热 我懂但是这个△H 该怎样算
H2(g)+1/2O2(g)==H2O(g) △H=-241.8KJ/mol .①
H2(g)+1/2O2(g)==H2O(l) △H=-285.8KJ/mol.②
H2O(l)==H2O(g) 依据盖斯定律: △H=①-②=+44.0KJ/mol
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