The volume of gas at 20 °C and 1.00 bar adsorbed on the surface of 1.50 g of a sample of silica at 0 °C was 1.60 cm³ at 52.4 kPa and 2.73 cm³ at 104 kPa. What is the number of adsorption sites avaible? Assume the adsorption follows the Langmuir isotherm. Answer: cm³

What are all the possible ways activated carbon can be modified in its adsorption capacity?

7.5 micromoles ( u mol) of carbon dioxide are adsorbed onto a 1.0 gram sample of activated carbon. How many milligrams of CO2 were adsorbed?

Using Freundlich adsorption isotherm calculate the extent of adsorption of a dye on activated carbon at 25°C, where k = 0.025, n = 0.5 and C = 0.04.

A certain solid sample adsorbs 0.44 mg of CO when the pressure of the gas is 26.0 kPa and the temperature is 300 K. The mass of gas adsorbed when the pressure is 3.0 kPa and the temperature is 300 K is 0.19 mg. The Langmuir isotherm is known to describe the adsorption. Estimate the fractional coverage of the surface at the two pressures.

What is an adsorption isotherm? Describe Freundlich adsorption isotherm.

1.2-MIB (Methylisoborneol) is one of the by-products of algae and is a representative trace pollutant that causes taste and smell of water. The isothermal adsorption equation of 2-MIB applied with activated carbon in water without organic matter was experimentally determined as follows.q = 1.48C^(0.65) Where q is ng 2-MIB / g activated carbon and C is the concentration of g / L 2-MIB (g / L).(n is 10 ^ -9) A. Calculate the amount of activated carbon (mg / L) required to reduce the concentration of 2-MIB to 5 g / L. It is assumed that the concentration of 2-MIB in water without organic matter is 50 g / L.B. The activated carbon adsorption column will be designed with a three-year operating period. If the density of activated carbon is 540 kg / m3 and the design flow rate per column effective cross-section is 10 m / hr, find the depth of activated carbon in the empty bed contact time (EBCT) and column. Here, it is assumed that there is no competitive adsorption that can interfere with…

A solid in contact with a gas at 8.86 kPa and 25 °C adsorbs 4.67 mg of the gas and obeys the Langmuir isotherm. The enthalpy change when 1.00 mmol of the adsorbed gas is desorbed is +12.2 J. What is the equilibrium pressure for the adsorption of the same mass of gas at 45 °C? Hint: See the hint for Exercise E19B.5(a).

The adsorption of a certain substance, X, follows a Langmuir isotherm. Saturation coverage of the materials is 8 × 10-¹0 mol/cm² and 3 = 5 × 107 cm³/mol (assuming a₁ = C₁). At what concentration of X will the electrode surface be half covered (i.e., = 0.5)? Sketch the adsorption isotherm of the substance.

Explain the relationship given by Freundlich in adsorption isotherm.