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A student dissolves 14.1 g of sodium chloride (NaCl) in 300. g of water in a well-insulated open cup. She then observes the temperature of the water fall from 22.0 °C to 20.5 °C over the course of 4.1 minutes. Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction: NaCl(s) → Na"(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 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 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. kJ Calculate the reaction enthalpy AH per mole of NaCl. rxn mol

A student dissolves 14.1 g of sodium chloride (NaCl) in 300. g of water in a well-insulated open cup. She then observes the temperature of the water fall from 22.0 °C to 20.5 °C over the course of 4.1 minutes. Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction: NaCl(s) → Na"(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 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 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. kJ Calculate the reaction enthalpy AH per mole of NaCl. rxn mol

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
Chapter4: Energy And Chemical Reactions
Section: Chapter Questions
Problem 19QRT: Solid ammonium chloride is added to water in a beaker and dissolves. The beaker becomes cold to the...
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A student dissolves 14.1 g of sodium chloride (NaCl) in 300. g of water in a well-insulated open cup. She then observes the temperature of the water fall from 22.0 °C to 20.5 °C over the course of 4.1 minutes. Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction: + NaCl(s) → Na"(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 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. exothermic Is this reaction exothermic, endothermic, or neither? O 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 the reaction enthalpy AH per mole of NaCl. mol
Transcribed Image Text:A student dissolves 14.1 g of sodium chloride (NaCl) in 300. g of water in a well-insulated open cup. She then observes the temperature of the water fall from 22.0 °C to 20.5 °C over the course of 4.1 minutes. Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction: + NaCl(s) → Na"(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 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. exothermic Is this reaction exothermic, endothermic, or neither? O 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 the reaction enthalpy AH per mole of NaCl. mol
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