# Questions tagged [kinetics]

The study of rates and steps in mechanisms of chemical processes.

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10 views

### How does temperature affect the activation energy?

I know that it affects the reaction by increasing the energy of particles so that more of them have a higher or equal energy than the activation energy. However, when I look at a rate equation and ...
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### A “function of proportionality” in a rate law

I am currently studying rate laws and the determination of the order of a reaction. So first-order reactions remind me of linear functions $f(x)=kx$ while second-order reactions remind me of quadratic ...
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### How does the temperature affect the frequency factor?

I am a high school student and have been trying to learn how the temperature affects the frequency factor. I did not even understand the equation below, which is from this site. Can anyone please ...
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### Are the reaction rates of these equations equal?

$$\ce{CH3CH2CH2Br + OH- -> CH3CH2CH2OH + Br-}$$ $$\mathrm{rate} = k[\ce{CH3CH2CH2Br}][\ce{OH-}]$$ If I change the $\ce{Br}$ with any element from halogens (without changing concentration, volume, ...
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### Stoichiometry in rate law [closed]

When are the stoichiometric coefficients equal to the exponents of concentration in rate law r=k[a]^m?
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### Enthalpy and Activation Energy [closed]

Could you help me with this question, please? In an exothermic reaction: A- The activation energy depends on the energy released. B- Products energy is lower than reactants energy and that depends on ...
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### Literature value for the activation energy of the reaction between hydrochloric acid and sodium bicarbonate

Does anybody have the literature value for the activation energy of the reaction between hydrochloric acid and sodium bicarbonate? If yes, could you please cite the source for it and the value? I ...
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### Why do the NMR peaks shift when H+ concentration and temperature are varied on the reversible hydrolysis of pyruvic acid to 2,2-dihydroxypropionate? [closed]

We performed two experiments. Each of the peaks are referring to the methyl peaks in both reactant and product of the hydrolysis reaction. We varied $\ce{H+}$ concentration of the reaction and the ...
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### Order of reaction in adsorption process

(1) $\ce{PH3(g) <=>[W]PH3(adsorption)->[W]P(s) + 3/2 H2(g)}$ The decomposition of phosphine on tungsten surface at low pressure is a pseudo first order reaction. This is because the rate of ...
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### Convert to NASA polynomial format for chemical kinetic calculations

I have calculated thermodynamic properties of a metal oxide through DFT calculations, I want to convert it to NASA polynomial format and use those thermodynamic properties along with rate constants ...
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### Order of reaction for hydrogen ions being ignored

I have been reading through a case study about calculating the order of reaction for the following reaction: $$\ce{H2O2 + 3 I- + 2 H+ -> I3- + 2 H2O}$$ The paper uses an iodine clock reaction ...
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### Why do statistical effects impact stepwise stability constants?

I have a question regarding the stepwise stability constants of metal complex formation/substitution. My lecture notes say that if we have a metal complex, say $\ce{[MX_{6}]}$, and a substitution ...
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### Finding change in activation energy from change in rate constant in catalysis

I need to find by how much the activation energy decreases when the rate constant increases by a '$x$' factor when a catalyst is used in the reaction. I'm just super confused about how to solve this....
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### Which is faster- SN1 or SN2?

We were studying about nucleophilic substitution reactions. My professor said that in general SN1 reactions are faster than SN2 reactions. I am unable to understand that how can we generalise the rate ...
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### Can I use the quasi-equilibrium approximation when drug and ligand distribution volumes are different?

A drug $D$ binds a ligand $L$ to form a complex $C$ according to the law of mass action. Furthermore, mass balance should be achieved. Can I still assume quasi-equilibrium when the distribution ...
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### Chemical Kinetics regarding Iodination of Cyclohexanone

We did an experiment to determine the overall order of iodination of cyclohexanone. Rate of a certain chemical reaction = $\ce{k[A]^p[B]^q[C]^r}$ so the overall order = p+q+r We're referring to a ...
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### Chemical kinetics

Consider a reversible reaction $\ce{A}$ converts to $\ce{B}$ and $\ce{B}$ converts to $\ce{A}$ with forward and backward rate constants $k_\mathrm{fwd} = k_\mathrm{rev }= \pu{1 s-1}.$ Suppose we start ...
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### Explosive reaction based on reaction rate

Question We have the following chemical reactions: \begin{align} \ce{A + B^* &-> C + D^*}\tag{1}\\ \ce{D^* &-> B^* + B^*}\tag{2}\\ \ce{B^* &-> B}\tag{3} \end{align} ...
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### Rate Expression with two products

Consider the two following cases Case 1: Two Same Products Given the following chemical reaction, $$A + B \rightarrow C + C$$ where C are radicals, therefore I am not writing $2C$ on the right ...
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