First Law of Thermodynamics(II) (Conservation of Energy)

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First Law of Thermodynamics(II)(Conservation of
Energy)

• Lecture Note 8
• Physical Chemistry II, 2008
• KAIST

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At B0, reduces to ideal gas case.
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Assuming no phase changes
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m.p
b.p.
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Hesss Law treat chemical equations like
mathematical equations to calculate ?rH
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Using energy level diagram helps
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Reactants elements Product one mole of a
molecule All in standard states
Standard state
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Diagram like this can be helpful in applying
Hesss law
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Zero is for the Pure Element In its normal
state At 25? and one bar
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Enthalpy of reaction directly from vaules in the
Table
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