Zadanie 17
Dividing both sides of the equation ΔG⊖ = ΔH⊖ − TΔS⊖ by −T gives −ΔG⊖/T = −ΔH⊖/T + ΔS⊖. Which term represents the entropy change of the surroundings? A. −ΔG⊖/T…
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Dividing both sides of the equation ΔG⊖ = ΔH⊖ − TΔS⊖ by −T gives −ΔG⊖/T = −ΔH⊖/T + ΔS⊖. Which term represents the entropy change of the surroundings? A. −ΔG⊖/T…
Excess calcium carbonate reacts with 25 cm3 of hydrochloric acid of concentration 1.0 mol dm−3 in an open flask. The solid line shows how the decrease in mass of the flask and its contents changes with time. The experiment is…
Why does a powdered solid react faster with a dilute acid, at the same temperature, than a single lump of the same mass of the solid? A. Collisions between particles are more frequent. B. Collisions between particles are more energetic. C. The activation…
A student monitors the rate of a reaction using a colorimeter. In which mixture would the absorbance change as the reaction proceeds? A. NaOH(aq) + HNO3(aq) B. KCl(aq) + I2(aq) C. KI(aq) + Cl2(aq) D. CH3COOH(aq) + KOH(aq)
Nitrogen dioxide reacts with fluorine as shown below. 2 NO2(g) + F2(g) → 2 NO2F(g) rate = k[NO2][F2] How does the rate of disappearance of NO2 compare with that of F2? A. NO2 disappears at half the rate of…
The table shows initial rate data for the hydrolysis of a tertiary halogenoalkane, RBr, with aqueous sodium hydroxide at constant temperature. Which statements are correct? I. The reaction is first order with respect to hydroxide ions. II. The reaction is…
Which energy profile diagram represents an exothermic SN2 reaction of a primary halogenoalkane with a nucleophile? A. Diagram A B. Diagram B C. Diagram C D. Diagram D
The rate constant, k, of a reaction was measured at several temperatures, and ln k was plotted against , where T is the temperature in kelvin. Two points on the line of best fit are marked on the graph.…
In the Arrhenius equation, , which statement about the factor A is correct? A. It is the minimum energy needed for a successful collision. B. It is related to the frequency of collisions with the proper orientation. C. It is the…
At a certain temperature, Kc = 12 for the reaction What is the value of Kc, at the same temperature, for the reaction below? H2(g) + Br2(g) ⇌ 2 HBr(g) A. 122 B. 2 × 12 C. D.…