A chemistry student needs to determine the enthalpy of desorption for a specific substance. The substance was adsorbed onto activated carbon in a packed bed reactor at 25°C and under a pressure of 4 bar. The adsorption process was carried out until saturation was reached. The packed bed reactor was then heated to 100°C until complete desorption. The pressure was maintained at 4 bar during the entire process. Given the initial mass of the adsorbate and the final mass of the activated carbon, calculate the enthalpy of desorption for the substance.

Question

A chemistry student needs to determine the enthalpy of desorption for a specific substance. The substance was adsorbed onto activated carbon in a pac

Answer 1

To calculate the enthalpy of desorption for the substance, we need some additional information, such as the initial mass of the adsorbate  m1 , the final mass of the activated carbon  m2 , and the specific heat capacity of the substance  Cp . However, I can provide you with the general formula to calculate the enthalpy of desorption.The enthalpy of desorption  H_des  can be calculated using the following formula:H_des =  m1 - m2  * Cp *  T2 - T1 where:- m1 is the initial mass of the adsorbate  in grams - m2 is the final mass of the activated carbon  in grams - Cp is the specific heat capacity of the substance  in J/gK - T1 is the initial temperature  25C, which is 298 K - T2 is the final temperature  100C, which is 373 K Once you have the values for m1, m2, and Cp, you can plug them into the formula and calculate the enthalpy of desorption for the substance.