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A student dissolves 14.4 g of potassium hydroxide (KOH)in 250. g of water in a well-insulated open cup. He then observes the temperature of the water ris from 21.0 °C to 35.2 °C over the course of 5.3 minutes. Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction: KOH(s) K+ (aq) + OH (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 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 am 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 AHxn per mole of KOH. O exothermic endothermic Oneither kJ 0- kJ mol 0 X

A student dissolves 14.4 g of potassium hydroxide (KOH)in 250. g of water in a well-insulated open cup. He then observes the temperature of the water ris from 21.0 °C to 35.2 °C over the course of 5.3 minutes. Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction: KOH(s) K+ (aq) + OH (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 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 am 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 AHxn per mole of KOH. O exothermic endothermic Oneither kJ 0- kJ mol 0 X

Chemistry: The Molecular Science
Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter12: Chemical Equilibrium
Section: Chapter Questions
Problem 84QRT
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A student dissolves 14.4 g of potassium hydroxide (KOH)in 250. g of water in a well-insulated open cup. He then observes the temperature of the water rise from 21.0 °C to 35.2 °C over the course of 5.3 minutes. Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction: KOH(s) K(aq) + OH (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 KOH. rxn 0 exothermic endothermic neither kJ kJ mol 0x10 X 5
Transcribed Image Text:A student dissolves 14.4 g of potassium hydroxide (KOH)in 250. g of water in a well-insulated open cup. He then observes the temperature of the water rise from 21.0 °C to 35.2 °C over the course of 5.3 minutes. Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction: KOH(s) K(aq) + OH (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 KOH. rxn 0 exothermic endothermic neither kJ kJ mol 0x10 X 5
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