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5. Thermodynamics and thermochemistry — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistry5. Thermodynamics and thermochemistry1 Mark
MCQ
Which of the following statement is correct ?
  • A
    $E_{Cell}$ and $\Delta G$ of cell reaction both are extensive properties
  • B
    $E_{Cell}$ and $\Delta G$ of cell reaction both are intensive properties
  • ✓
    $E_{Cell}$ is an intensive property while $\Delta G$ of cell reaction is an extensive property.
  • D
    $E_{Cell}$ is an extensive property while $\Delta G$ of cell reaction is an intensive property.
✓

Answer

Correct option: C.
$E_{Cell}$ is an intensive property while $\Delta G$ of cell reaction is an extensive property.
c
An intensive property is a bulk property, meaning that it is a physical property of a system that does not depend on the system size or the amount of material in the system.

An extensive property is a property that changes when the size of the sample changes

$\Delta G =- nF E _{\text {cell }}$

In the above equation the free energy equation is dependent on amount of material of system whereas electrode potential is independent on amount of system.

$E _{\text {cell }}$ is an intensive property and $\Delta G$ is an extensive property

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