Zadanie 1c
A sample of 0.0120 mol of NO2 was placed in a sealed vessel of volume 1.00 dm3, 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…
Dynamic equilibrium
Describe the characteristics of a physical or chemical system at dynamic equilibrium in a closed system: equal forward and reverse rates, constant macroscopic properties, equilibrium reached from either direction, with examples such as evaporation in a sealed flask.
Tę umiejętność sprawdza 5 zadań wzorowanych na arkuszach IB z 2025 roku.
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Zadanie 22
Which condition applies to a reaction mixture that has reached equilibrium at constant temperature and pressure? A. ΔH = 0 B. ΔG = 0 C. K = 1 D. ΔSsystem = 0
Zadanie 3d
(i) Calculate the enthalpy change, ΔH, 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…
- Materiał graficzny
Zadanie 23
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…
Zadanie 30
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…