AP EAMCET · Chemistry · Surface Chemistry
The adsorption of a gas at the boiling point of the gas follows the isotherm shown in the figure. Identify the correct thermodynamic properties at point \(C\).
- A \(\Delta H=T \Delta S, \Delta G=0\)
- B \(\Delta H>T \Delta S, \Delta G=+\) ve
- C \(\Delta H < T \Delta S, \Delta G=-v e\)
- D \(\Delta H=T \Delta S=\Delta G=0\)
Answer & Solution
Correct Answer
(A) \(\Delta H=T \Delta S, \Delta G=0\)
Step-by-step Solution
Detailed explanation
Amount of gas adsorbed remains constant at point \(C\) irrespective of increase in pressure. So, the system is in equilibrium \[ \therefore \quad \Delta G=0 \] As we know, \[ \Delta G=\Delta H-T \Delta S \] \[ \therefore \quad \Delta H=T \Delta S . \]
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