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The hvdroxyl radical (OH) plays an important role in
Chapter 9, Problem 121P(choose chapter or problem)
The hydroxyl radical \((\mathrm {OH})\) plays an important role in atmospheric chemistry. It is highly reactive and has a tendency to combine with a \(\mathrm {H}\) atom from other compounds, causing them to break up. Thus, \(\mathrm {OH}\) is sometimes called a "detergent" radical because it helps to clean up the atmosphere. (a) Write the Lewis structure for the radical. (b) Refer to Table 9.4 and explain why the radical has a high affinity for \(\mathrm {H}\) atoms. (c) Estimate the enthalpy change for the following reaction:
\(\mathrm{OH}(g)+\mathrm{CH}_{4}(g) \longrightarrow \mathrm{CH}_{3}(g)+\mathrm{H}_{2} \mathrm{O}(g)\)
(d) The radical is generated when sunlight hits water vapor. Calculate the maximum wavelength (in nanometers) required to break an \(\mathrm{O}―\mathrm{H}\) bond in \(\mathrm{H}_{2} \mathrm{O}\).
Questions & Answers
QUESTION:
The hydroxyl radical \((\mathrm {OH})\) plays an important role in atmospheric chemistry. It is highly reactive and has a tendency to combine with a \(\mathrm {H}\) atom from other compounds, causing them to break up. Thus, \(\mathrm {OH}\) is sometimes called a "detergent" radical because it helps to clean up the atmosphere. (a) Write the Lewis structure for the radical. (b) Refer to Table 9.4 and explain why the radical has a high affinity for \(\mathrm {H}\) atoms. (c) Estimate the enthalpy change for the following reaction:
\(\mathrm{OH}(g)+\mathrm{CH}_{4}(g) \longrightarrow \mathrm{CH}_{3}(g)+\mathrm{H}_{2} \mathrm{O}(g)\)
(d) The radical is generated when sunlight hits water vapor. Calculate the maximum wavelength (in nanometers) required to break an \(\mathrm{O}―\mathrm{H}\) bond in \(\mathrm{H}_{2} \mathrm{O}\).
ANSWER:Step 1 of 5
Lewis structures:
The bonding in the molecule can be understood by its structures, which involves the distribution of electrons around each atom and type of bonding (single, double, triple).
Lewis structure represents the electron distribution around atoms in the molecule, it is also known as electron - dot structures which have the following features.
- These structures take into account only valence electrons
- This clearly shows bonding and non bonding electrons.
- All atoms should obey the octet rule.