Energy cycles in reactions

Chemia IBPaper 2, maj 2026, TZ1wzorowane3 pktobliczeniowetrudne (szac.)

Zadanie 2d

Rubidium also forms compounds with halogens such as chlorine, Cl. Annotate the Born–Haber cycle for rubidium chloride, RbCl, with the correct values in the boxes A, B and C. Use sections 9 and 12 of the data booklet.

• Materiał graficzny

Chemia IBPaper 2, maj 2026, TZ3wzorowane7 pktobliczenioweśrednie (szac.)

Zadanie 2a

(i) Sulfur dioxide is oxidized to sulfur trioxide by nitrogen dioxide in the atmosphere. Determine the enthalpy change, ΔH^⊖, in kJ mol⁻¹, for the reaction SO₂(g) + NO₂(g) → SO₃(g) + NO(g) given these reactions and enthalpy…

• Materiał graficzny

Chemia IBPaper 2, maj 2026, TZ1wzorowane7 pktobliczeniowetrudne (szac.)

Zadanie 3a

(i) Determine the enthalpy of combustion of pentane, in kJ mol⁻¹, using table 12 in the data booklet. C₅H₁₂(g) + 8 O₂(g) → 5 CO₂(g) + 6 H₂O(g) (ii) Calculate the mass, in g, of carbon dioxide, CO₂, produced when 45.0 g of pentane react with…

Chemia IBPaper 2, maj 2026, TZ3wzorowane6 pktobliczenioweśrednie (szac.)

Zadanie 4b

Propane undergoes complete combustion. C₃H₈(g) + 5 O₂(g) → 3 CO₂(g) + 4 H₂O(l) (i) Calculate the standard enthalpy change of reaction, ΔH^⊖, in kJ mol⁻¹, for the combustion of propane. Use section 13 of the data booklet. (ii)…

Chemia IBPaper 2, maj 2026, TZ3wzorowane5 pktotwarteśrednie (szac.)

Zadanie 4f

Ethanol can be used as a fuel. (i) Calculate the enthalpy change for the combustion of ethanol using section 12 of the data booklet. C₂H₅OH(g) + 3 O₂(g) → 2 CO₂(g) + 3 H₂O(g) (ii) The enthalpy of formation of ethanol is defined from its elements. State,…

Chemia IBPaper 2, maj 2026, TZ2wzorowane2 pktobliczenioweśrednie (szac.)

Zadanie 5a

State the overall reaction of the cycle and determine its enthalpy change, in kJ mol⁻¹.

Chemia IBPaper 2, maj 2026, TZ2wzorowane3 pktobliczenioweśrednie (szac.)

Zadanie 5b

Use bond enthalpies to calculate the enthalpy change, in kJ mol⁻¹, for the first reaction. Br ^∙ (g) + O₃(g) → BrO ^∙ (g) + O₂(g) Use section 12 of the data booklet and the table below.

• Tabela do uzupełnienia

Chemia IBPaper 1A, maj 2026, TZ1wzorowane1 pktzamkniętetrudne (szac.)

Zadanie 21

Given the following data: CaO(s) + CO₂(g) → CaCO₃(s) ΔH = −p kJ 2 Ca(s) + O₂(g) → 2 CaO(s) ΔH = −q kJ 2 CaCO₃(s) → 2 Ca(s) + 2 C(s) + 3 O₂(g) ΔH = +r kJ What is the ΔH of the…

Chemia IBPaper 1A, maj 2026, TZ2wzorowane1 pktzamknięteśrednie (szac.)

Zadanie 22

Which ionic compound is expected to have the largest lattice enthalpy? A. MgO B. NaF C. KBr D. CaS

Chemia IBPaper 1A, maj 2026, TZ2wzorowane1 pktzamknięteśrednie (szac.)

Zadanie 23

The Born–Haber cycle for the formation of potassium fluoride, KF, is shown. What is the enthalpy of formation of potassium fluoride, KF, in kJ mol-1? A. −490 B. +86.5 C. +1088.5 D. −569.5

• Tabela do uzupełnienia
• Materiał graficzny