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A student dissolves 14.5 g of potassium chloride (KCI)in 250. g of water in a well-insulated open cup. She then observes the temperature of the water fall from 21.0 °C to 16.3 "C over the course of 5.7 minutes. Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction: KCIG) -- K" (a9) + Cr (a9) You can make any reasonable assumptions about the physical properties of the solution. Be sure answers you calculate using measured data are rounded to 2 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 O.P Is this reaction exothermic, endothermic, or neither? O endothermic O 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. 4.9 kJ Calculate the reaction enthalpy A per mole of KCI. 29. mol

A student dissolves 14.5 g of potassium chloride (KCI)in 250. g of water in a well-insulated open cup. She then observes the temperature of the water fall from 21.0 °C to 16.3 "C over the course of 5.7 minutes. Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction: KCIG) -- K" (a9) + Cr (a9) You can make any reasonable assumptions about the physical properties of the solution. Be sure answers you calculate using measured data are rounded to 2 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 O.P Is this reaction exothermic, endothermic, or neither? O endothermic O 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. 4.9 kJ Calculate the reaction enthalpy A per mole of KCI. 29. mol

General Chemistry - Standalone book (MindTap Course List)
General Chemistry - Standalone book (MindTap Course List)
11th Edition
ISBN:9781305580343
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Chapter18: Thermodynamics And Equilibrium
Section: Chapter Questions
Problem 18.109QP: Silver carbonate, Ag2CO3, is a light yellow compound that decomposes when heated to give silver...
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A student dissolves 14.5 g of potassium chloride (KCI)in 250. g of water in a well-insulated open cup. She then observes the temperature of the water fall from 21.0 °C to 16.3 °C over the course of 5.7 minutes. Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction: KCI() -- K (aq) + C (ag) You can make any reasonable assumptions about the physical properties of the solutiaon. Be sure answers you calculate using measured data are rounded to 2 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 O.P Is this reaction exothermic, endothermic, or neither? O endothermic O 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. 4.9 kJ Calculate the reaction enthalpy AH per mole of KCI. 29.- mol
Transcribed Image Text:A student dissolves 14.5 g of potassium chloride (KCI)in 250. g of water in a well-insulated open cup. She then observes the temperature of the water fall from 21.0 °C to 16.3 °C over the course of 5.7 minutes. Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction: KCI() -- K (aq) + C (ag) You can make any reasonable assumptions about the physical properties of the solutiaon. Be sure answers you calculate using measured data are rounded to 2 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 O.P Is this reaction exothermic, endothermic, or neither? O endothermic O 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. 4.9 kJ Calculate the reaction enthalpy AH per mole of KCI. 29.- mol
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