10% sites of catalyst bed have adsorbed by H_2 on heating H_2 gas is evolved from sites and collected at 0.03atm and 300K in a small vessel of 2.46cm^3. No.of sites available is 5.4 xx 10^16 per cm^2 and surface area is 1000 cm^2. Findout the no.of surface sites occupied per molecule of H_2 (N_A = 6 x 10^23)

10% sites of catalyst bed have adsorbed by H_2 on heating H_2 gas is e

1.	10% sites of catalyst bed have adsorbed by H_2 on heating H_2 gas is evolved from sites and collected at 0.03atm and 300K in a small vessel of 2.46cm^3. No.of sites available is 5.4 xx 10^16 per cm^2 and surface area is 1000 cm^2. Findout the no.of surface sites occupied per molecule of H_2 (N_A = 6 x 10^23)
Answer» 1 2 3 4 Solution :1 Adsorbed moles of `H_2 = (0.03 xx 2.46 xx 10^(-3))/(0.0821 xx 300) = 3 xx 10^(-6)` No. of ABSORBED molecules of `H_2 = 3 xx 10^(-6) xx 6 xx 10^(23) = 18 xx 10^(17)` Total no. of SURFACE sites available `= 5.4 xx 10^(16) xx 1000 = 5.4 xx 10^(19) cm^2` No. of surface sites that is occupied by adsorption of `H_2 = 10/100 xx 5.4 xx 10^(19) = 5.4 xx 10^(18)` No. of surface sites occupied by one molecule `H_2 = (5.4 xx 10^(18))/(18 xx 10^(17)) = 3`.