Most of the sulfur used in the United States is chemically synthesized from hydrogen sulfide gas recovered from natural gas wells. In the first step of this synthesis, called the Claus process, hydrogen sulfide gas is reacted with dioxygen gas to produce gaseous sulfur dioxide and water. Suppose a chemical engineer studying a new catalyst for the Claus reaction finds that 183. liters per second of dioxygen are consumed when the reaction is run at 204. °C and the dioxygen is supplied at 0.64 atm. Calculate the rate at which sulfur dioxide is being produced. Give your answer in kilograms per second. Be sure your answer has the correct number of significant digits.

#3 The first step in the reaction sequence for the production of nitric acid via the oxidation of ammonia is: 4NH3 + 502 2 4NO + 6H2O 75% conversion is achieved with an equimolar mixture of ammonia and oxygen fed at the rate of 100 mol/h. Determine the outlet compositions. (Hint: determine the limiting reactant).

Review | Constants | PeriIodic Table The standard heat of formation, Ar H°, is defined as the enthalpy change for the formation of one mole of substance from its constituent elements in their standard states. Thus, elements in their standard states have AfH® =0. Heat of formation values can be used to calculate the enthalpy change of any reaction. Part A For which of the following reactions is A,H° equal to Ar H° of the product(s)? Consider, for example, the reaction You do not need to look up any values to answer this question. 2NO(g) + O2(9) = 2NO2(9) Check all that apply. with heat of formation values given by the following table: • View Available Hint(s) Substance (kJ mol-1) NO(9) O C(s) + 02 (9)→CO2(9) 90.2 O2 (9) O Li(s) + F2(1)→LIF(s) NO2(9) 33.2 O Li(s) + F2(9)→LİF(s) O 2Li(s) +F2(9)→2LİF(s) Then the heat of formation for the overall reaction is A,H°= EnpAf H° (products)- nA¢H° (reactants) O CO(g) + ÷O2(9)→CO2(9) 2(33.2) [2(90.2) + 0] -114 kJ mol-1 O BaCO3(s)→BA0(s) + CO2(9)…

Acetylene is produced from methane in the following reaction 2CH. (g) → C₂H₂(g) + 3H₂(g) An undesired side reaction is the decomposition of acetylene C₂H₂ (g) →2C₂(c) + H₂(g) Methane at 1000° C is fed to the reactor at a rate of 10 mol/s. The reactor operates isothermally at 1000° C. a. The fractional conversion of methane is 0.60 and the molar ratio of acetylene produced to methane consumed is 0.417. Calculate the rate of heat transfer (in kW) from/to the reactor. (Q= + 1100 kW) b. Calculate the rate of heat transfer (in kW) from/to the reactor if no side reaction occurs and the reaction goes to completion. 1819I ||