Carbon monoxide is a controlled emission from vehicle exhausts. Catalytic converters catalyse the conversion of CO to
Question:
Carbon monoxide is a controlled emission from vehicle exhausts. Catalytic converters catalyse the conversion of CO to CO2. Emissions of CO can be quantified using IR spectroscopy with detection limits of <0.5 mgm−3.
(a) The IR absorption monitored during analysis for CO is at 2143 cm−1. Draw a diagram of the vibrational mode that gives rise to this absorption.
(b) Why might the presence of CO2 interfere with detection of CO?
(c) 78% of the Earth’s atmosphere is N2, and the fundamental stretching mode gives rise to an absorption at 2359 cm−1. Why does this absorption not interfere with CO analysis by IR spectroscopy?
(d) By referring to Chapter 29, comment on why CO is toxic.
(e) Calculate the number of molecules of CO present in 1 dm3 of air containing 0.20 mgm−3 CO.
Step by Step Answer:
a Diagram of the vibrational mode that gives rise to the absorption at 2143 cm1 In CO the vibrational mode responsible for the absorption at 2143 cm1 ...View the full answer
