Which of the following statements is false du | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) Adsorption is a spontaneous process, which implies that the Gibbs free energy change $(\Delta G)$ must be negative $(\Delta G < 0)$.
Since gas

Vedclass · Accepted Answer

Enthalpy change is positive

Vedclass · Answer

(A) Adsorption is a spontaneous process, which implies that the Gibbs free energy change $(\Delta G)$ must be negative $(\Delta G < 0)$.
Since gas molecules are adsorbed onto a solid surface, their freedom of movement decreases, leading to a decrease in entropy $(\Delta S < 0)$.
From the equation $\Delta G = \Delta H - T\Delta S$, for $\Delta G$ to be negative when $\Delta S$ is negative, the enthalpy change $(\Delta H)$ must be negative $(\Delta H < 0)$.
Therefore, adsorption is an exothermic process, meaning heat is released, and the enthalpy change is negative.
Thus, the statement that 'Enthalpy change is positive' is false.

Which of the following statements is false during the adsorption of gas molecules on a metal surface?

Similar Questions

Distinguish between the meaning of the terms adsorption and absorption. Give one example of each.

The decomposition of gaseous $H_2$ adsorbed on a metal surface like tungsten is a reaction of which order?

$A$ gas undergoes physical adsorption on a surface and follows the given Freundlich adsorption isotherm equation $\frac{x}{m} = k p^{0.5}$. Adsorption of the gas increases with

Why do physisorption and chemisorption behave differently with a rise in temperature?

Which one of the following statements is not correct?

Vedclass Test Series

Exam Paper Generator

Online Exam Module