Zadanie 21
Wzorowane na: Chemistry HL Paper 1, May 2023, TZ2, pytanie 21. Treść, dane i kontekst są zmienione; sprawdzane umiejętności, format i punktacja jak w oryginale.
Darmowe konto pozwoli wrócić do niego później.
Polecenie
The temperature of a reaction mixture is raised and the rate constant, k, increases. Which statement best explains why?
A. The activation energy of the reaction decreases
B. The reaction becomes more exothermic
C. More particles are present in the same volume
D. A greater proportion of collisions has energy equal to or greater than the activation energy
Sprawdź rozwiązanieUkryj rozwiązanieKlucz i punktacja
Odpowiedź z klucza
D ✔
«the activation energy and the enthalpy change are not changed by a change in temperature, and the number of particles per unit volume is fixed; the rate constant rises because the energy distribution shifts so that a larger fraction of collisions have energy of at least Ea (the Arrhenius equation, )»
Schemat punktowania
One mark for the correct option.