Useful informa The following describes the process which occurs when an ionic solid MX dissolves in water. H₂O + 2X* (aq) MX2(s) (aq) Thus, the value of AG, for reaction (1) can be used to predict the aqueous solubility of MX₂. (a) Give a balanced chemical equation corresponding to each of the terms below, clearly indicating the states of the species involved (i.e. whether solid, liquid or gas). M2+ Terms Enthalpy of aquation of Ca²+ Enthalpy of aquation of F Enthalpy of aquation of I Lattice energy of CaF2 Lattice energy of Calz ii) Cal₂(s) b) Use the appropriate equations in part (a) to construct a Born Haber cycle and hence calculate AH, for each of the following reactions: H₂0 i) CaF₂(s)- Jaquation Values (kJ mol-¹) -1615 -485 -280 -2634 -2065 H₂O Ca 2+ aq Ca2+ aq + 2F¯ q + 21 aq

Useful informa The following describes the process which occurs when an ionic solid MX dissolves in water. H₂O + 2X* (aq) MX2(s) (aq) Thus, the value of AG, for reaction (1) can be used to predict the aqueous solubility of MX₂. (a) Give a balanced chemical equation corresponding to each of the terms below, clearly indicating the states of the species involved (i.e. whether solid, liquid or gas). M2+ Terms Enthalpy of aquation of Ca²+ Enthalpy of aquation of F Enthalpy of aquation of I Lattice energy of CaF2 Lattice energy of Calz ii) Cal₂(s) b) Use the appropriate equations in part (a) to construct a Born Haber cycle and hence calculate AH, for each of the following reactions: H₂0 i) CaF₂(s)- Jaquation Values (kJ mol-¹) -1615 -485 -280 -2634 -2065 H₂O Ca 2+ aq Ca2+ aq + 2F¯ q + 21 aq

Chemistry: Principles and Practice

3rd Edition

ISBN:9780534420123

Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Chapter17: Chemcial Thermodynamics

Section: Chapter Questions

Problem 17.14QE

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NI3 decomposes as shown below: 2 Nl3(s) → N2(g) + 3 I2(g) Use the thermochemical information given below to calculate the standard Gibbs energy change (in kJ mol¬1) of this reaction at 298.15 K. NI3(s) N2(2) 2(g). AH;° (kJ mol-1) S° (J mol-1K-1) 287.0 62.40 230.0 191.6 260.7 O-161.1 O -387.0 O +513.7 +119.0 O -540.0
The Gibbs energy for a reaction Mg(s) + H₂O(g) → MgO(s) + H₂(g) at a particular temperature is AG = -100.0 kJ/mol. At the same time under the sa conditions, A,G° = +341 kJ/mol. Which of the following statements is true? The reaction is at equilibrium and P(H₂O) = P(H₂). The reaction proceeds in the reverse direction to produce more H₂O(g). The reaction proceeds in the forward direction to produce more H₂(g). The reaction is at equilibrium and P(H₂O) > P(H₂). The reaction is at equilibrium and P(H₂O) < P(H2).
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6 . Enthalapy of solution For NH4No3 and MgSO4
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