Zadania z chemii IB HL

Explain, using collision theory, why the rate of this reaction decreases when the temperature is lowered.

The Maxwell–Boltzmann distribution below was obtained for a sample of gas at temperature $T_1$. The activation energy of a reaction is marked as $E_\mathrm{a}$. Which graph shows the distribution for the same sample at a higher temperature, $T_2$, together…

(i) Sketch the Maxwell–Boltzmann energy distribution curve for the particles in this reaction mixture at 25 °C, marking on the diagram the activation energy both with and without the catalyst. (ii) On the same axes, sketch and label a second Maxwell–Boltzmann…

(i) Sketch the Maxwell–Boltzmann distribution curve for 298 K on the same axes as the 800 K curve. (ii) On the graph, annotate the position corresponding to the activation energy, $E_\mathrm{a}$. (iii) With reference to the graph, explain why a lower…

Which reaction has the lowest activation energy? A. $\ce{HBr(g) -> H(g) + Br(g)}$ B. $\ce{2Cl(g) -> Cl2(g)}$ C. $\ce{CH4(g) + Cl(g) -> CH3(g) + HCl(g)}$ D. $\ce{HBr(g) -> H+(g) + Br-(g)}$

In the energy profile of a reaction shown below, P, Q and R are energies measured from the same baseline. Which expressions give the activation energy of the forward reaction, $E_a$, and the enthalpy change of the forward reaction, $\Delta H$? A. $E_a = Q$;…

Raising the temperature of a reaction mixture by 10 °C can double the rate of reaction, even though the collision frequency increases by only a few per cent. What is the main reason for the large increase in rate? A. The activation energy of the reaction is…