Zadanie 15
Wzorowane na: Chemistry SL Paper 1A, May 2026, TZ2, pytanie 15. Treść, dane i kontekst są zmienione; sprawdzane umiejętności, format i punktacja jak w oryginale.
Darmowe konto pozwoli wrócić do niego później.
Polecenie
Manganese(IV) oxide is added to a solution of hydrogen peroxide, which then decomposes much faster. Which quantity on the energy profile of the decomposition is the same with and without the catalyst?
A. The activation energy of the forward reaction
B. The enthalpy change of the reaction
C. The activation energy of the reverse reaction
D. The energy of the transition state
Sprawdź rozwiązanieUkryj rozwiązanieKlucz CKE i punktacja
Odpowiedź z klucza
B ✔
«a catalyst provides an alternative pathway with a lower activation energy, so the activation energies of the forward and reverse reactions and the energy of the transition state all change; the reactants and products are the same, so the enthalpy change of the reaction is unchanged»
Schemat punktowania
One mark for the correct option; no partial credit.