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A student dissolves 10.8 g of sodium hydroxide (NaOH)in 200. g of water in a well-insulated open cup. She then observes the temperature of the water rise from 21.0 °C to 34.2 °C over the course of 8.7 minutes. Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction: NaOH(s) Na (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 3 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 AHxn per mole of NaOH. O exothermic endothermic neither 0- kJ mol X

A student dissolves 10.8 g of sodium hydroxide (NaOH)in 200. g of water in a well-insulated open cup. She then observes the temperature of the water rise from 21.0 °C to 34.2 °C over the course of 8.7 minutes. Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction: NaOH(s) Na (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 3 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 AHxn per mole of NaOH. O exothermic endothermic neither 0- kJ mol 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
Chapter4: Energy And Chemical Reactions
Section4.8: Measuring Reaction Enthalpies: Calorimetry
Problem 4.17E
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C -0 O THERMOCHEMISTRY Calculating heat of reaction from constant-pressure calorimetry... A student dissolves 10.8 g of sodium hydroxide (NaOH)in 200. g of water in a well-insulated open cup. She then observes the temperature of the water rise from 21.0 °C to 34.2 °C over the course of 8.7 minutes. Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction: NaOH(s) Na (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 3 significant digits. F1 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 AH per mole of NaOH. Explanation F2 Check 80 F3 DOD 000 FA F5 exothermic endothermic F6 neither kJ kJ 0- mol MacBook Air ◄◄ F7 0/5 X FR $ 2022 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center F10 4)
Transcribed Image Text:C -0 O THERMOCHEMISTRY Calculating heat of reaction from constant-pressure calorimetry... A student dissolves 10.8 g of sodium hydroxide (NaOH)in 200. g of water in a well-insulated open cup. She then observes the temperature of the water rise from 21.0 °C to 34.2 °C over the course of 8.7 minutes. Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction: NaOH(s) Na (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 3 significant digits. F1 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 AH per mole of NaOH. Explanation F2 Check 80 F3 DOD 000 FA F5 exothermic endothermic F6 neither kJ kJ 0- mol MacBook Air ◄◄ F7 0/5 X FR $ 2022 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center F10 4)
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