Energy profiles for exothermic and endothermic reactions

Sketch and interpret energy profile diagrams with reaction coordinate on the x axis and potential energy on the y axis, marking reactants, products, activation energy and ΔH, and link the relative stability of reactants and products to the sign of ΔH.

Zadania sprawdzające tę umiejętność: 6 Otwórz w wyszukiwarce z filtrami
Zadanie 15Paper 1A, maj 2026
wzorowane1 pktzamkniętełatwe (szac.)

Which classification is correct for this reaction? 2Mg(s)+COX2(g)2MgO(s)+C(s)\ce{2Mg(s) + CO2(g) -> 2MgO(s) + C(s)}, heat is released A. Endothermic; temperature decreases; reactants more stable B. Exothermic; temperature decreases; products more stable C. Exothermic; temperature…

Zadanie 16Paper 1A, listopad 2025, TZ1
wzorowane1 pktzamkniętełatwe (szac.)

The potential energy profile of a reaction is shown. Which reaction has this energy profile? A. ClX2(g)2Cl(g)\ce{Cl2(g) -> 2Cl(g)} B. CaCOX3(s)CaO(s)+COX2(g)\ce{CaCO3(s) -> CaO(s) + CO2(g)} C. NX2OX4(g)2NOX2(g)\ce{N2O4(g) -> 2NO2(g)} D. 2Mg(s)+OX2(g)2MgO(s)\ce{2Mg(s) + O2(g) -> 2MgO(s)}

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