Ammonia synthesis: N2 + 3 H2 ↔ 2 NH3 is equilibrium-limited (meaning Xeq is low) at standard operating conditions. The standard-stateenthalpy of formation of NH3, according to the NIST webbook, is - 45.9 kJ mol−1. If temperature increases, will equilibrium conversion increase or decrease? b) Describe using words and images (if necessary) – but without any equations – thecriteria for steady-state stability for exothermic reactions occurring in a CSTR. c) Give two reasons (short statements) why the rate of a catalyzed reaction mightdecrease as the pressure of one of its products increases. d) Give two ways (short statements) for a reactor to manage heat released from anexothermic reaction?

Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
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Ammonia synthesis:

N2 + 3 H2 ↔ 2 NH3

is equilibrium-limited (meaning Xeq is low) at standard operating conditions. The standard-state
enthalpy of formation of NH3, according to the NIST webbook, is - 45.9 kJ mol−1. If temperature increases, will equilibrium conversion increase or decrease?

b) Describe using words and images (if necessary) – but without any equations – the
criteria for steady-state stability for exothermic reactions occurring in a CSTR.

c) Give two reasons (short statements) why the rate of a catalyzed reaction might
decrease as the pressure of one of its products increases.

d) Give two ways (short statements) for a reactor to manage heat released from an
exothermic reaction?

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