You should use care when dissolving H₂SO4 in water because he process is highly exothermic. To measure the enthalpy hange, 5.1 g of concentrated H₂SO4 (l) was added (with tirring) to 140. g of water in a coffee-cup calorimeter. This esulted in an increase in temperature from 21.2 °C to 29.4 °C. Calculate the enthalpy change for the process H₂SO4 (l) – → H₂SO4 (aq), in kJ/mol. Assume the specific heat capacity of the solution is 4.2 J/g. K. Enthalpy change kJ/mol

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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You should use care when dissolving H₂SO4 in water because
the process is highly exothermic. To measure the enthalpy
change, 5.1 g of concentrated H₂SO4(l) was added (with
stirring) to 140. g of water in a coffee-cup calorimeter. This
resulted in an increase in temperature from 21.2 °C to 29.4 °C.
Calculate the enthalpy change for the process
H₂SO4 (l) → H₂SO4 (aq), in kJ/mol. Assume the specific heat
capacity of the solution is 4.2 J/g. K.
Enthalpy change
kJ/mol
Transcribed Image Text:You should use care when dissolving H₂SO4 in water because the process is highly exothermic. To measure the enthalpy change, 5.1 g of concentrated H₂SO4(l) was added (with stirring) to 140. g of water in a coffee-cup calorimeter. This resulted in an increase in temperature from 21.2 °C to 29.4 °C. Calculate the enthalpy change for the process H₂SO4 (l) → H₂SO4 (aq), in kJ/mol. Assume the specific heat capacity of the solution is 4.2 J/g. K. Enthalpy change kJ/mol
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