Adsorption isobar is a curve showing variation of adsorptiona)With tem...
The adsorption isobar is a graphical representation of the variation in adsorption with temperature at constant pressure. The curve is obtained by plotting the amount of adsorbate adsorbed per unit mass of adsorbent against the temperature at constant pressure.
Explanation:
Adsorption is a process in which a substance (adsorbate) is attracted and held onto the surface of another substance (adsorbent). The amount of adsorption depends on various factors such as temperature, pressure, surface area, nature of adsorbent and adsorbate, etc.
The adsorption isobar is obtained by keeping the pressure constant and varying the temperature. The isobar curve shows the effect of temperature on the adsorption process. As the temperature increases, the adsorption decreases due to the decrease in the attractive forces between the adsorbate and adsorbent.
The shape of the adsorption isobar depends on the nature of the adsorbate and adsorbent. For example, for physisorption (physical adsorption), the adsorption isobar is generally a smooth curve. On the other hand, for chemisorption (chemical adsorption), the curve may have a sharp peak due to the formation of chemical bonds between the adsorbate and adsorbent.
In conclusion, the adsorption isobar is a useful tool for understanding the effect of temperature on the adsorption process. By studying the shape of the curve, we can gain insights into the nature of adsorption and the properties of the adsorbent and adsorbate.