A student dissolves 10.2 g of lithium chloride (LiCl)in 250. g of water in a well-insulated open cup. She then observes the temperature of the water rise from 20.0 °C to 27.1 °C over the course of 7.5 minutes. Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction: LiC(s) Li* (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 LİCI. *rxn mol

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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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A student dissolves 10.2 g of lithium chloride (LİCI)in 250. g of water in a well-insulated open cup. She then observes the temperature of the water rise from
20.0 °C to 27.1 °C over the course of 7.5 minutes.
Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction:
LICI(s)
Li* (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 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?
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 LİCI.
rxn
mol
Transcribed Image Text:A student dissolves 10.2 g of lithium chloride (LİCI)in 250. g of water in a well-insulated open cup. She then observes the temperature of the water rise from 20.0 °C to 27.1 °C over the course of 7.5 minutes. Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction: LICI(s) Li* (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 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? 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 LİCI. rxn mol
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