Zadania z chemii IB HL

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A sample of 0.0120 mol of $\ce{NO2}$

was placed in a sealed vessel of volume 1.00

\mathrm{dm^3}

, which was kept at a constant temperature of 35 °C. (i) Suggest a simple way of keeping the vessel at a constant temperature in a school laboratory. (ii) The…

Which condition applies to a reaction mixture that has reached equilibrium at constant temperature and pressure? A. $\Delta H = 0$ B. $\Delta G = 0$ C. $K = 1$ D. $\Delta S_\text{system} = 0$

(i) Calculate the enthalpy change, $\Delta H$ , for the overall synthesis of propyl ethanoate from propane and ethane shown above. Use section 12 of the data booklet. (ii) Two students each calculated the enthalpy change for the reaction between propan-1-ol and…

A sealed glass tube contains solid iodine in equilibrium with iodine vapour at constant temperature. Which of the following could be observed? A. The purple colour of the vapour gradually becomes more intense B. The total mass of the solid decreases steadily…

Which statement explains why a chemical equilibrium is described as dynamic? A. The forward and reverse reactions continue to take place at equal rates. B. The concentrations of the reactants and products keep changing until the reaction stops. C. The position…