Zadanie 5a
(i) Calculate, in kJ mol−1, the standard enthalpy change of this hydrogenation reaction using the enthalpy of combustion data in section 14 of the data booklet. (ii) The standard entropy change for this reaction is…
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(i) Calculate, in kJ mol−1, the standard enthalpy change of this hydrogenation reaction using the enthalpy of combustion data in section 14 of the data booklet. (ii) The standard entropy change for this reaction is…
90.0 cm3 of buta-1,3-diene and 150.0 cm3 of hydrogen are mixed in a container at 450 K and 101 kPa and react to form butane only. Determine the maximum volume of butane that can be formed, measured at the same temperature and pressure.
(i) Draw the Lewis formula of buta-1,3-diene. (ii) State the hybridization of the carbon atoms in buta-1,3-diene.
Three orbital shapes, labelled I, II and III, are drawn below. Which row correctly identifies the shapes of a 2s orbital and a 2p orbital? A. 2s: II, 2p: I B. 2s: I, 2p: III C. 2s: I, 2p: II D. 2s: III, 2p: II
In the first step, manganese(III) ions formed from the manganate(VII) are complexed by ethanedioate ions. [Mn(H2O)6]3+(aq) + 2 C2O42−(aq) → [Mn(C2O4)2(H2O)2]−(aq) + 4 H2O(l) (i) Deduce the oxidation state of carbon in [Mn(C2O4)2(H2O)2]−. (ii)…
Both ionic and covalent bonding are present in sodium ethanedioate, Na2C2O4. (i) Describe both types of chemical bonding present in this compound. Ionic bonding: Covalent bonding: (ii) Deduce a Lewis formula of the ethanedioate ion, C2O42−.…
What is the charge of the monatomic ion usually formed by the element with the following electron configuration? [Ne] 3s2 3p4 A. 2+ B. 2− C. 4+ D. 6+
Calcium ions and phosphate(V) ions combine to form an ionic compound. What is its formula? A. CaPO4 B. Ca2(PO4)3 C. Ca3(PO4)2 D. Ca3(PO3)2
During discharge, sodium atoms stored in the hard carbon are converted into sodium ions. (i) State the half-equation for the process taking place at the anode while the battery discharges. (ii) With reference to section 19 of the data booklet, comment on the…
The diagram below shows the battery connected to a charger. Annotate the diagram to show the direction in which electrons flow through the external wires while the battery is being recharged.