0
answers
0
watching
315
views
10 Nov 2019
SiF6 is an industrial etchant used in a variety of manufacturing industries. During it's decomposition, it forms a number of long-lived byproducts which need to be treated, including oxyfluorides SOF2 and SOF4. The hydrolysis of these compounds to form SO2 and SO2F2 is an important reaction in understanding how these industrial processes operate. In order to determine the kinetics of these hydrolysis reactions, reactions were carried out in a 3.7-liter vessel operated under isothermal conditions. During each experiment, the vessel was initially evacuated then charged with 2.23 mg of H_2O and 0.0004 mol of either SOF2 or SOF4. Following injection of the water and oxyfluorides, SiF_6 was injected as an "inert" to bring the pressure in the reactor to 200 kPa. The composition of the reacting gases was then measured over time using a GC/MS specifically calibrated for monitoring the reactants and products in this system. In each reaction, the kinetics were found to be primarily dependent on the concentration of oxyfluorides present... This was due to the concentration of water remaining fairly constant as it absorbed to the walls and simply desorbed as required to maintain a set equilibrium concentration on the gas phase. i.e. SOF_2 + H_2O rightarrow SO_2 + 2HF, -r_SOF2 = k_1 [C_SOF2]^n SOF_4 + H_2O rightarrow SO_2F_2 + 2HF, - r_SOF4 = k_2[C_SOF4]^m Using the following data, determine the rate constants and orders of reaction for each reaction.. Using the integral method, determine k_2 and m given:
SiF6 is an industrial etchant used in a variety of manufacturing industries. During it's decomposition, it forms a number of long-lived byproducts which need to be treated, including oxyfluorides SOF2 and SOF4. The hydrolysis of these compounds to form SO2 and SO2F2 is an important reaction in understanding how these industrial processes operate. In order to determine the kinetics of these hydrolysis reactions, reactions were carried out in a 3.7-liter vessel operated under isothermal conditions. During each experiment, the vessel was initially evacuated then charged with 2.23 mg of H_2O and 0.0004 mol of either SOF2 or SOF4. Following injection of the water and oxyfluorides, SiF_6 was injected as an "inert" to bring the pressure in the reactor to 200 kPa. The composition of the reacting gases was then measured over time using a GC/MS specifically calibrated for monitoring the reactants and products in this system. In each reaction, the kinetics were found to be primarily dependent on the concentration of oxyfluorides present... This was due to the concentration of water remaining fairly constant as it absorbed to the walls and simply desorbed as required to maintain a set equilibrium concentration on the gas phase. i.e. SOF_2 + H_2O rightarrow SO_2 + 2HF, -r_SOF2 = k_1 [C_SOF2]^n SOF_4 + H_2O rightarrow SO_2F_2 + 2HF, - r_SOF4 = k_2[C_SOF4]^m Using the following data, determine the rate constants and orders of reaction for each reaction.. Using the integral method, determine k_2 and m given: