Elementary Principles of Chemical Processes 4th. Edition by Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard | 9780470616291 | 0470616296 | Holooly

Intro to Chemical Engineering

Elementary Principles of Chemical Processes

135 SOLVED PROBLEMS

Question: 10.2.2

Transient Behavior of a Stirred-Tank Reactor A liquid-phase reaction with stoichiometry A → B takes place in a continuous well-mixed 10.0-liter stirred tank reactor. A schematic diagram of the process is shown below. The reactor may be considered perfectly mixed, so that the contents are uniform ...

Verified Answer:

Compare what follows with the general procedure gi...

Question: 9.5.6

Energy Balance on a Neutralization Process A 10.0 wt% aqueous solution of H2SO4 at 40°C is to be neutralized with a 20.0 wt% aqueous solution of NaOH at 25°C in a continuous reactor. At what rate in kJ/kg H2SO4 solution must heat be removed from the reactor if the product solution emerges at 35°C? ...

Verified Answer:

Basis: 1 kg H

_{2}

SO

_{4}[/lat...

Question: 9.5.5

Standard Heat of a Neutralization Reaction 1. Calculate ΔH°r for the reaction H3PO4(aq, r = ∞) + 3NaOH(aq, r = 50) → Na3PO4(aq, r = ∞) + 3H2O(l) 2. If 5.00 mol of NaOH dissolved in 250 mol of water is neutralized completely at 25°C with dilute phosphoric acid, what is the attendant enthalpy change? ...

Verified Answer:

1.

H_{3}PO_{4}

(aq): Δ

\hat{H}...

Question: 9.5.4

Simultaneous Material and Energy Balances The ethanol dehydrogenation reaction of Example 9.5-3 is carried out with the feed entering at 300°C. The feed contains 90.0 mole% ethanol and the balance acetaldehyde and enters the reactor at a rate of 150 mol/s. To keep the temperature from dropping too ...

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A degree-of-freedom analysis based on atomic speci...

Question: 9.5.3

Energy Balance on an Adiabatic Reactor The dehydrogenation of ethanol to form acetaldehyde C2H5OH(v) → CH3CHO(v) + H2(g) is carried out in a continuous adiabatic reactor. Ethanol vapor is fed to the reactor at 400°C, and a conversion of 30% is obtained. Calculate the product temperature (a) using ...

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Basis: 100 mol Feed Material balances lead to the ...

Question: 9.5.2

Energy Balance on a Methane Oxidation Reactor Methane is oxidized with air to produce formaldehyde in a continuous reactor. A competing reaction is the combustion of methane to form CO2. 1. CH4(g) + O2 → HCHO(g) + H2O(v) 2. CH4(g) + 2O2 → CO2 + 2H2O(v) A flowchart of the process for an assumed ...

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Basis: 100 mol CH

_{4}

Fed Since the...

Question: 9.5.1

Energy Balance About an Ammonia Oxidizer One hundred mol NH3/s and 200 mol O2/s at 25°C are fed into a reactor in which the ammonia is completely consumed. The product gas emerges at 300°C. Calculate the rate at which heat must be transferred to or from the reactor, assuming operation at ...

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Basis: Given Feed Rates (Verify the product flow r...

Question: 9.3.1

Determination of a Heat of Reaction from Heats of Formation Determine the standard heat of reaction for the combustion of liquid n-pentane, assuming H2O(l) is a combustion product. C5H12(l) + 8O2(g) → 5CO2(g) + 6H2O(l) ...

Verified Answer:

From Equation 9.3-1

\boxed{ΔH^{°}_{r} = \su...

Question: 9.4.1

Calculation of a Heat of Reaction from Heats of Combustion Calculate the standard heat of reaction for the dehydrogenation of ethane: C2H6 → C2H4 + H2 ...

Verified Answer:

From Table B.1 or using APEx function DeltaHcg, [l...

Question: 8.5.1

Production of Hydrochloric Acid Hydrochloric acid is produced by absorbing gaseous HCl (hydrogen chloride) in water. Calculate the heat that must be transferred to or from an absorption unit if HCl(g) at 100°C and H2O(l) at 25°C are fed to produce 1000 kg/h of 20.0 wt% HCl(aq) at 40°C. ...

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It is advisable to determine the molar amounts or ...

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