Which of the following characteristics is not | vedclass

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

Question

(D) Physical adsorption decreases with an increase in temperature because an increase in temperature leads to an increase in kinetic energy of molecul

Vedclass · Accepted Answer

Amount of adsorption increases with increase in temperature.

Vedclass · Answer

(D) Physical adsorption decreases with an increase in temperature because an increase in temperature leads to an increase in kinetic energy of molecules and hence,their desorption.Since physical adsorption is an exothermic process,it occurs more readily at lower temperatures and decreases with an increase in temperature (Le-Chatelier's Principle).If the adsorption is a spontaneous phenomenon,it should be exothermic,at least for adsorption from the gaseous phase.$A$ molecule in the gas phase will have an entropy higher than in the adsorbed state,then the $\Delta S$ should be negative. The only way to have a $\Delta G$ negative (spontaneous) is to have a $\Delta H$ negative (exothermic process).Therefore,the process will be spontaneous $(\Delta G < 0)$ if the temperature is low.

Which of the following characteristics is not correct for physical adsorption?

Similar Questions

According to the Langmuir adsorption isotherm,the amount of gas adsorbed at very high pressures:

Which of the following statements is incorrect?

Give a reason why a finely divided substance is more effective as an adsorbent.

If $x$ gram of gas is adsorbed by $m$ gram of adsorbent at pressure $P$,the plot of $\log \frac{x}{m}$ versus $\log P$ is linear. The slope of the plot is: ($n$ and $k$ are constants and $n > 1$ )

Which process occurs in chromatography?

Vedclass Test Series

Exam Paper Generator

Online Exam Module