 Home

Codex Wiki

List of universities

University of Cambridge

Course of the University of Cambridge

Natural sciences course of the University of Cambridge

Year of the natural sciences course of the University of Cambridge

Year 1 of the natural sciences course of the University of Cambridge

Chemistry course of the year 1 of the natural sciences course of the University of Cambridge

Past exam of the chemistry course of the year 1 of the natural sciences course of the University of Cambridge

2024

Paper 1

The intermediate balance is
$$
\frac{d[\mathrm{ONOO}]}{dt}=k_1[\mathrm{NO}][\mathrm{O_2}]-k_{-1}[\mathrm{ONOO}]-k_2[\mathrm{NO}][\mathrm{ONOO}].
$$
Setting this derivative approximately to zero under the <quasi-steady-state approximation> gives
$$
\boxed{[\mathrm{ONOO}]_{\rm ss}=\frac{k_1[\mathrm{NO}][\mathrm{O_2}]}{k_{-1}+k_2[\mathrm{NO}]}.}
$$
Both dissociation and reaction with NO remove the intermediate. Its steady concentration is not zero and does not require the first reversible pair to be at equilibrium.

Solution

Past exam of the chemistry course of the year 1 of the natural sciences course of the University of Cambridge / 2024 / Paper 1 / 4 / b / i / Solution

Past exam of the chemistry course of the year 1 of the natural sciences course of the University of Cambridge / 2024 / Paper 1 / 4 / b / i / Solution

 Ancestors (14)

 Discussion (0)

 Articles by others on the same topic (0)

Past exam of the chemistry course of the year 1 of the natural sciences course of the University of Cambridge / 2024 / Paper 1 / 4 / b / i / Solution

 Ancestors (14)

 Discussion (0)  Subscribe (1)

 Articles by others on the same topic (0)

 Discussion (0)