Zadanie 4d
Propene can be reduced to propane by hydrogen gas in the presence of a platinum catalyst at 50 °C. Outline how the catalyst increases the rate of this reaction.
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Propene can be reduced to propane by hydrogen gas in the presence of a platinum catalyst at 50 °C. Outline how the catalyst increases the rate of this reaction.
Ethene reacts with water in the presence of an acid catalyst at room temperature. C2H4(g) + H2O(l) → C2H5OH(l) ΔH⊖ = −44 kJ mol−1 (i) Calculate the change in entropy, ΔS⊖, for this reaction in…
What is the number of hydrogen atoms in 0.200 mol of propylamine, C3H7NH2? NA = 6.02 × 1023 mol−1 A. 1.20 × 1023 B. 1.08 × 1024 C. 8.43 × 1023 D. 1.08 × 1025
Reactions of halogenoalkanes with hydroxide ions are an example of nucleophilic substitution. (i) Sketch the mechanism for the reaction of 1-chloropropane with aqueous potassium hydroxide. Use curly arrows to show the movement of electrons. (ii) State the name…
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)…
(i) State the names of the organic compounds used to produce the ester shown below. (ii) State the name of the by-product of this reaction. (iii) The compounds butan-1-ol and ethoxyethane have the same molar mass. Their structures are shown below. Explain,…
Ethane, C2H6, reacts with chlorine, Cl2, to produce chloroethane, C2H5Cl. (i) Outline why the reaction does not start unless the mixture is exposed to ultraviolet light. (ii) Deduce two propagation steps and one termination step for this…
(i) Explain why 1,2-dichloroethene, ClCH=CHCl, has two stereoisomers but 1,1-dichloroethene, CH2=CCl2, does not. (ii) State the hybridization of the carbon atoms in propene, CH3CH=CH2. (iii) Predict the number of signals and the relative…
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,…
How many ions are present in 142 g of Na2SO4? M(Na2SO4) = 142 g mol−1 A. 1 B. 3 C. 6.02 × 1023 D. 1.81 × 1024