The molar reaction enthalpy - experimental and theoretical calculation

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Fit4Abi Biologie und Chemie

Published on Jan 7, 2023
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This video is about determining the reaction enthalpy, clearly presented for secondary school chemistry lessons with example calculations. First, the basics of calorimetry are explained and shown how the enthalpy of combustion of a portion of methane can be determined using a calorimeter. Then we show, by example, how a molar reaction enthalpy can be derived from this experimental value. Finally, the standard molar reaction enthalpy for the combustion of methane is determined using a collection of formulas from the standard enthalpies of formation and compared with the experimental value. !!! Important: there is an error in the sign here; when heat energy is released, the sign of the enthalpy is naturally negative! (-804KJ/mol) !!! For those who have seen the second part of the series on the mole: part of it is repeated here.

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