Zadanie 1b
The second step converts nitrogen monoxide to nitrogen dioxide. 2 NO(g) + O2(g) ⇌ 2 NO2(g) ΔH⊖ = −114 kJ mol−1 (i) Identify the oxidation state of nitrogen in NO and in NO2. (ii) State the equilibrium constant…
Magnitude and temperature dependence of K
Interpret the size of K as a measure of how far a reaction proceeds (K much greater than 1 favours products), explain that K changes only with temperature, and relate the K values of a reaction and its reverse (1/K) or of a scaled equation.
Tę umiejętność sprawdza 13 zadań wzorowanych na arkuszach IB z lat 2022–2026.
Zadania sprawdzające tę umiejętność: 13 Otwórz w wyszukiwarce z filtrami
Zadanie 22
What can be deduced about this equilibrium reaction from these data? A(g) + B(g) ⇌ 2 C(g) A. It is an exothermic reaction and [products] < [reactants] at equilibrium. B. It is an endothermic reaction and [products] < [reactants] at equilibrium. C. It…
- Tabela do uzupełnienia
Zadanie 22
The equilibrium below is established at one temperature. PCl5(g) ⇌ PCl3(g) + Cl2(g) K = 4.0 × 10−2 What is K for the reverse reaction at this temperature? A. 2.5 × 101 B. 1.6 × 10−3 C. 4.0 × 10−2 D.…
Zadanie 23
How does an increase in pressure, at constant temperature, affect the position of the following equilibrium and the value of the equilibrium constant, Kc? N2O4(g) ⇌ 2 NO2(g) A. Shifts to the left; Kc is unchanged B. Shifts to…
Zadanie 2b
When potassium thiocyanate solution is added to a pale yellow solution containing iron(III) ions, the following equilibrium is established. [Fe(H2O)6]3+(aq) + SCN−(aq) ⇌ [Fe(SCN)(H2O)5]2+(aq) + H2O(l) [Fe(H2O)6]3+(aq) is pale yellow and…
- Materiał graficzny
Zadanie 22
The following system is at equilibrium. H2(g) + I2(g) ⇌ 2 HI(g) K = 54 What is the value of the equilibrium constant, K, for the reaction 2 HI(g) ⇌ H2(g) + I2(g)? A. −54 B. C. D.
Zadanie 23
The container holding the equilibrium mixture below is compressed to half its volume while the temperature is kept constant. Which row gives the change in the amount of PCl5 and the effect on the equilibrium constant, K?…
Zadanie 23
A mixture of 1 mol of nitrogen and 1 mol of oxygen is left to reach equilibrium at 25 °C. N2(g) + O2(g) ⇌ 2 NO(g) K = 4.5 × 10−31 at 25 °C Which relationship holds in the equilibrium mixture? A. [NO] ≪ [N2] B.…
Zadanie 19
At a certain temperature the equilibrium constant for the reaction below is Kc = 50. H2(g) + I2(g) ⇌ 2 HI(g) What is the value of Kc for the reaction below at the same temperature? 2 HI(g) ⇌ H2(g) + I2(g) A. 0.020 B. 0.14 C. 25 D. 50
Zadanie 2a
In air, sulfur dioxide can be oxidized to sulfur trioxide. The reaction is reversible, and at high temperature it reaches equilibrium in a closed container. 2 SO2(g) + O2(g) ⇌ 2 SO3(g) (i) At 600 °C the equilibrium constant, K, for this reaction is…
Zadanie 2d
Deduce, using your answer to 2c(i), how the value of Kc changes when the temperature of the equilibrium mixture is increased.
Zadanie 2d
Using your answer to part 2c(i), deduce how the value of Kc changes when the temperature is raised.
Zadanie 2c
Methanol is manufactured from carbon monoxide and hydrogen. The reaction involves the equilibrium: CO(g) + 2 H2(g) ⇌ CH3OH(g) (i) Deduce the expression for the equilibrium constant, Kc, for this equation. (ii) Explain why an increase in pressure…