Chemistry: The Molecular Nature of Matter

7th Edition

ISBN: 9781118516461

Author: Neil D. Jespersen, Alison Hyslop

Publisher: WILEY

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Solutions can be considered as homogeneous mixtures which contain two or more than two chemical substances. The chemical substance which is the greater part is defined as solvent. And the chemical substance that is dissolved in a solvent is referred to a…

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Chapter 12, Problem 9RQ

Heats of Solution

The value of Δ H soln for a soluble compound is, say, +26 kJ mol -1 , and a nearly saturated solution is prepared in an insulated container (e.g., a coffee cup calorimeter). Will the systems temperature increase or decrease as the solute dissolves?

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Chapter 12, Problem 8RQ

Chapter 12, Problem 10RQ

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14. Consider two ionic solids, both composed of singly-charged ions, that have different lattice energies. Which solid will be more soluble in water, the one with the larger lattice energy or the one with the smaller lattice energy? Assume that solute- solvent interactions are the same for both solids. (A) The solid with the larger lattice energy, if entropy increases as a result of mixing, and the solid with the smaller lattice energy, if entropy decreases as a result of mixing. (B) The solid with the smaller lattice energy, if entropy increases as a result of mixing, and the solid with the larger lattice energy, if entropy decreases as a result of mixing. (C) The solid with the smaller lattice energy. (D) The solid with the larger lattice energy. (E) They will have the same or very similar solubilities.

In a constant‑pressure calorimeter, 70.0 mL70.0 mL of 0.300 M Ba(OH)20.300 M Ba(OH)2 was added to 70.0 mL70.0 mL of 0.600 M HCl.0.600 M HCl. The reaction caused the temperature of the solution to rise from 22.11 ∘C22.11 ∘C to 26.20 ∘C.26.20 ∘C. If the solution has the same density and specific heat as water (1.00 g/mL1.00 g/mL and 4.184J/g⋅°C,)4.184J/g⋅°C,) respectively), what is Δ?ΔH for this reaction (per mole H2OH2O produced)? Assume that the total volume is the sum of the individual volumes.

In a constant‑pressure calorimeter, 60.0 mL60.0 mL of 0.300 M Ba(OH)20.300 M Ba(OH)2 was added to 60.0 mL60.0 mL of 0.600 M HCl.0.600 M HCl. The reaction caused the temperature of the solution to rise from 21.78 ∘C21.78 ∘C to 25.87 ∘C.25.87 ∘C. If the solution has the same density and specific heat as water (1.00 g/mL1.00 g/mL and 4.184J/g⋅°C,)4.184J/g⋅°C,) respectively), what is Δ?ΔH for this reaction (per mole H2OH2O produced)? Assume that the total volume is the sum of the individual volumes. Δ?=ΔH= kJ/mol H2O

Chapter 12 Solutions

Chemistry: The Molecular Nature of Matter

Ch. 12 - Which substances will be soluble in water? (a)...Ch. 12 - Which substances will be soluble in nonpolar...Ch. 12 - Draw an enthalpy diagram for the endothermic...Ch. 12 - When potassium hydroxide is dissolved in water,...Ch. 12 - Prob. 5PE Ch. 12 - When sodium hydroxide is dissolved in water, the...Ch. 12 - At 25C and standard pressure, a hydrogen sulfide...Ch. 12 - How many grams of nitrogen and oxygen are...Ch. 12 - What volume of water at 20.0C(d=0.9982gmL-1) is...Ch. 12 - Prob. 10PE

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Heats of Solution The value of Δ H soln for a soluble compound is, say, +26 kJ mol -1 , and a nearly saturated solution is prepared in an insulated container (e.g., a coffee cup calorimeter). Will the systems temperature increase or decrease as the solute dissolves?

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