3) 0.55 kcal U. lonisation energy of Al = 5137 kJ/mol. A H Hydration of A1: = - 4665 kJ/mol COAH Bdration of CHF - 381 kJ/mol Which of the following statement is correct? AICI, remains covalent in aqueous solution 2) In aqueous solution AICI, becomes ionic 3) AICI, remains as Al,Clo in water 4) AICL exista ag ionic compound in benzene not for a cyclic process

Anhydroug A Cl_(3) is covalent . From the data given below Lattice Energy =5137KJ//mol DeltaH hydrogen for Al^(3+)=-4665KJ//mol DeltaH hydration for Cl^(-)=-381KJ//mol Identify the correct statement.

Ice and water are at equilibrium at 0^@ C , DeltaH =4 kJ/mol for the process, H_2 O_((s)) to H_2 O_((l)) which of the following is CORRECT?

Ice and water are at equilibrium at 0^@ C , DeltaH =4 kJ/mol for the process, H_2 O_((s)) to H_2 O_((l)) which of the following is CORRECT?

For a reaction, CaCO_(3(s)) rarr CaO_((s))+CO_(2(g)) Delta_(f)H^(@)(CaO)=-"631.1 kJ mol"^(-1) Delta_(f)H^(@)(CO_(2))=-"393.5 kJ mol"^(-1) and Delta_(f)H^(@)(CaCO_(3))=-"1206.9 kJ mol"^(-1) Which of the following is a correct statement? (A) A large amount of heat is evolved during the decomposition of C a C O 3 . (B)Decomposition of C a C O 3 is an endothermic process and heat is provided for decomposition (C) The amount of heat evolved cannot be calculated from the data provided . (D) Δ f H ∘ = Σ Δ f H ∘ (reactants) − Σ Δ f H ∘ (products)

Answer the following question (Based on EA, Delta_(eg)H^(ɵ) and IE ). (a) IE_(1) of Li is 5.4 eV "atom"^(-1) and the EA of Cl is 3.6 eV "atom"^(-1) . Calculate Delta_( r)H^(ɵ) in "kcal mol"^(-1) and kJ mol^(-1) for the reaction Li_((g))+Cl_((g)) rarr Li_((g))^(o+)+Cl_((g))^(ɵ) formed at such a low pressure that resulting ions do not combine with each other. (b) The IE of atoms X and Y are 400 and 300 kcal mol^(-1) respectively. EA's of these atoms are 80.0 and 85.0 K cal mol^(-1) . Explain as which of the atoms has higher EN . ( c) Explain why EA of S is -200 kJ mol^(-1) but the second EA is +649 kJ mol^(-1) ? (d) Which of the following pairs of elements would have more negative electron gain enthalpy (Delta_("eg")H^(ɵ)) ? (i) F or Cl , (ii) O or F (e) What would be the second electron gain enthalpy (Delta_(eg)H_(2)^(ɵ)) of oxygen as positive, more negative or less negative than first (Delta_(eg)H_(1)^(ɵ)) ? Explain. (f) Which has less negative Delta_(eg)H^(ɵ) oxygen or sulphur?