0.81 g sample of KCl is added to 37.9 g H2O and stirred until KCl completely dissolves in a 26.03.2021 Styrofoam cup. The temperature of the solution drops from 24.5 to 23.0 o C. (a) Is the process endothermic or exothermic? (b) What is the heat of solution of KCl expressed in kilojoules per mole of KCl? (Specific heat of water: 4.18 J/g o C)
0.81 g sample of KCl is added to 37.9 g H2O and stirred until KCl completely dissolves in a 26.03.2021 Styrofoam cup. The temperature of the solution drops from 24.5 to 23.0 o C. (a) Is the process endothermic or exothermic? (b) What is the heat of solution of KCl expressed in kilojoules per mole of KCl? (Specific heat of water: 4.18 J/g o C)
Chemistry: Matter and Change
1st Edition
ISBN:9780078746376
Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Publisher:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Chapter15: Energy And Chemical Change
Section: Chapter Questions
Problem 78A: Alloys When a 58.8-g piece of hot alloy is placed in125 g of cold water in a calorimeter, the...
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0.81 g sample of KCl is added to 37.9 g H2O and stirred until KCl completely dissolves in a 26.03.2021 Styrofoam cup. The temperature of the solution drops from 24.5 to 23.0 o C.
(a) Is the process endothermic or exothermic?
(b) What is the heat of solution of KCl expressed in kilojoules per mole of KCl? (Specific heat of water: 4.18 J/g o C)
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