Question

Calculate the heat of adsorption of hydrogen gas on a platinum surface given the initial temperature of the system is 298 K and the final temperature is 330 K. The mass of the platinum surface used is 5 grams, and the amount of hydrogen adsorbed is 0.01 moles. Assume the heat capacity of the system is constant at 25 J/K.

Answer 1

To calculate the heat of adsorption, we can use the formula:q = n * C * Twhere q is the heat of adsorption, n is the amount of hydrogen adsorbed  in moles , C is the heat capacity of the system  in J/K , and T is the change in temperature  in K .First, let's find the change in temperature:T = T_final - T_initialT = 330 K - 298 KT = 32 KNow, we can plug the values into the formula:q =  0.01 moles  *  25 J/K  *  32 K q = 0.01 * 25 * 32q = 8 JSo, the heat of adsorption of hydrogen gas on the platinum surface is 8 Joules.