Umiejętności z tego działu sprawdza 41 zadań wzorowanych na arkuszach IB z lat 2022–2026. Dział pojawia się w 31 z 54 arkuszy w bazie.
(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…
(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…
Propane undergoes complete combustion. C3H8(g) + 5 O2(g) → 3 CO2(g) + 4 H2O(g) (i) Calculate the enthalpy change of reaction, ΔH, in kJ mol−1, for the combustion of propane. Use section 12 of the data booklet. (ii) State the…
State the overall reaction of the cycle and determine its enthalpy change, in kJ mol−1.
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.
The enthalpy change for the combustion of propane is calculated from bond enthalpy data and compared with the literature value. C3H8(g) + 5 O2(g) → 3 CO2(g) + 4 H2O(l) Which statement best explains why the calculated value is less negative than the…
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…
Suppose carbonyl dibromide were made by a free-radical chain reaction of carbon monoxide, CO, with bromine vapour, Br2, started by ultraviolet light. The questions below treat this hypothetical route with the bond-enthalpy model. (i) Write an…
Propene reacts with bromine to produce 1,2-dibromopropane. CH3CH=CH2(g) + Br2(g) → CH3CHBrCH2Br(g) Calculate the enthalpy, in kJ, of the reaction using section 12 of the data booklet.
(i) Calculate the enthalpy change, ΔH, for the overall synthesis of propyl ethanoate from propane and ethane shown above. Use section 12 of the data booklet. (ii) Two students each calculated the enthalpy change for the reaction between propan-1-ol and…
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