ChemistryIf the value of R is 8.314 J K-1 mol-1, what is the difference between molar heat capacities at constant pressure and constant volume for 5 moles of Ar gas (molar mass = 40 g mol-1)?

If the value of R is 8.314 J K-1 mol-1, what is the difference between molar heat capacities at constant pressure and constant volume for 5 moles of Ar gas (molar mass = 40 g mol-1)?

  1. A

    8.314 J

  2. B

    41.570 J

  3. C

    1.663 J

  4. D

    748.26 J

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    Solution:

    Cp-Cv=nR for n moles

    Cp-Cv=5×8.314             =41.570 J

     

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