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Principles of General Chemistry | 2nd Edition | ISBN: 9780073511085 | Authors: Martin S. Silberberg
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Besides its use in making black-and-white film, silver

Chapter 14, Problem 28P

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QUESTION:

Problem 28P

Besides its use in making black-and-white film, silver nitrate (AgNO3) is used similarly in forensic science. The NaCl left behind in the sweat of a fingerprint is treated with AgNO3 solution to form AgCl. This precipitate is developed to show the black-and-white fingerprint pattern. Given ΔHlattice of AgNO3 = 822 kJ/mol and ΔHhydr = −799 kJ/mol, calculate its ΔHsoln.

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QUESTION:

Problem 28P

Besides its use in making black-and-white film, silver nitrate (AgNO3) is used similarly in forensic science. The NaCl left behind in the sweat of a fingerprint is treated with AgNO3 solution to form AgCl. This precipitate is developed to show the black-and-white fingerprint pattern. Given ΔHlattice of AgNO3 = 822 kJ/mol and ΔHhydr = −799 kJ/mol, calculate its ΔHsoln.

ANSWER:

Solution 28P:

Here, we are going to calculate the enthalpy changes for the solution ().

Step 1:

We know that, the enthalpy changes for the solution () is equal to the sum of the heat of hydration () and heat of solute (

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