A student dissolves 12.6 g of lithium chloride (LiCl) in 200. g of water in a well-insulated open cup. She then observes the temperature of the water rise from 20.0 °C to 33.2 °C over the course of 6.9 minutes. Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction: LiCl(s) → Li* (aq) + Cl¯ (aq)
A student dissolves 12.6 g of lithium chloride (LiCl) in 200. g of water in a well-insulated open cup. She then observes the temperature of the water rise from 20.0 °C to 33.2 °C over the course of 6.9 minutes. Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction: LiCl(s) → Li* (aq) + Cl¯ (aq)
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Transcribed Image Text:A student dissolves 12.6 g of lithium chloride (LiCl)in 200. g of water in a well-insulated open cup. She then observes the temperature of the water rise from
20.0 °C to 33.2 °C over the course of 6.9 minutes.
Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction:
LiCl(s)
Lit (aq) + CI (aq)
You can make any reasonable assumptions about the physical properties of the solution. Be sure answers you calculate using measured data are rounded to the
correct number of significant digits.
Note for advanced students: it's possible the student did not do the experiment carefully, and the values you calculate may not be the same as the known and
published values for this reaction.
Is this reaction exothermic, endothermic, or neither?
If you said the reaction was exothermic or endothermic, calculate the amount of
heat that was released or absorbed by the reaction in this case.
Calculate the reaction enthalpy ΔΗ per mole of LiCl.
rxn
O exothermic
O endothermic
O neither
KJ
kJ
mol
X
Expert Solution
Step 1
Given data
12.6 g of lithium chloride (LiCI) in
200. g of water
temperature =20.0 C to 33.2 .C
LiCI(s) - Li^+(aq) + Cl (aq)
Step by step
Solved in 2 steps with 1 images
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