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Module 1: Equilibrio

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Rendimiento de las reacciones químicas

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XSIQ
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Chemistry - Yield of chemical reactions

Yield of chemical reactions

The large-scale production of chemicals is the key to products and
services we take for granted as part of our life styles.

A laboratory analysis of an ammonia-based cleaning agent for NH3 content
does not require extensive knowledge of how the NH3 is produced or its
range of uses.

Properties of ammonia such as its ready solubility in water due to
hydrogen bonding and its capacity to act as a Bronsted-Lowry base may come
to mind during the analysis, but the significance of NH3 as an intermediate
in the production of a wide range of nitrogen-containing compound probably
would not.

The equation

describes the formation of ammonia from nitrogen and hydrogen. It would be
utilised for its

You are expected to be able to deduce from this equation that:

There are, however, many things this equation does NOT tell us about the
preparation of ammonia, including:

* the sources of N2 and H2

* the optimum temperature and pressure for the reaction

* how to collect the ammonia produced

* how fast the reactants are converted into products

* how efficient the reaction is

* the thermochemistry of the reaction, i.e. whether it releases or
absorbs energy as it proceeds

In the real world of industrial chemistry all these factors are of great
significance because chemicals must be manufactured under optimum economic
conditions, i.e. at the end of the day the manufacturers wish to make a
profit!

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