Liquid Hydrogen

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SESM3037

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12 Terms

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Ortho-para ratio

ratio of number of molecules occupying odd & even energy levels

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State Function

Path independent measurable quantity dependent on current state and not history

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Free energy

portion of internal energy converted to work, excluding heat content

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Internal Energy

energy contained within system

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Helmholtz Free Energy

free energy available for work at constant temperature and volume

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Gibbs Free Energy

Maximum work done at constant temperature and pressure

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Inversion Temperature

Temperature at which the Joule-Thompson coefficient changes sign

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Inversion Temperature of Helium

43 K

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Inversion Temperature of Hydrogen

202 K

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Inversion Temperature of Air

603 K

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Inversion Temperature of Nitrogen

623 K

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Inversion Temperature of Oxygen

761 K