A student dissolves 14.9 g of potassium chloride (KCI) in 200. g of water in a well-insulated open cup. He then observes the temperature of the water fall from 20.0 °C to 15.2 °C over the course of 8.9 minutes. Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction: KCl(s) K" (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. O exothermic Is this reaction exothermic, endothermic, or neither? O endothermic O neither If you sald the reaction was exothermic or endothermic, calculate the amount of heat that was released or absorbed by the reaction in this case. O kJ kJ Calculate the reaction enthalpy AH per mole of KCI. mol

A student dissolves 14.9 g of potassium chloride (KCI) in 200. g of water in a well-insulated open cup. He then observes the temperature of the water fall from 20.0 °C to 15.2 °C over the course of 8.9 minutes. Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction: KCl(s) K" (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. O exothermic Is this reaction exothermic, endothermic, or neither? O endothermic O neither If you sald the reaction was exothermic or endothermic, calculate the amount of heat that was released or absorbed by the reaction in this case. O kJ kJ Calculate the reaction enthalpy AH per mole of KCI. mol

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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Thermochemistry

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Exergonic Reaction

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Question 9
A student dissolves 14.9 g of potassium chloride (KCI) in 200. g of water in a well-insulated open cup. He then observes the temperature of the water fall from
20.0 °C to 15.2 °C over the course of 8.9 minutes.
Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction:
KCl(s) → K (aq) + Cl (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.
O exothermic
Is this reaction exothermic, endothermic, or neither?
O endothermic
O neither
If you sald the reaction was exothermic or endothermic, calculate the amount of
heat that was released or absorbed by the reaction in this case.
O kJ
kJ
Calculate the reaction enthalpy AH per mole of KCI.
mol
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A student dissolves 12.3 g of potassium chloride (KCI)in 250. g of water in a well-insulated open cup. He then observes the temperature of the water fall from 22.0 °C to 19.6 °C over the course of 5.9 minutes. Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction: olo Ar KCI(s) K* (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. exothermic Is this reaction exothermic, endothermic, or neither? endothermic 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. |kJ kJ Calculate…
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