issolves in water, heat may be evolved or absorbed. The heat of dissolution (dissolving) can Thermometer using a coffee cup calorimeter. Cardboard o ry a general chemistry student finds that when 21.37 g of BaBr,(s) are dissolved in 103.30 g mperature of the solution increases from 24.05 to 27.39 °C. Styrofoam li ity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a ment to be 1.77 J/°C. Nested Styrofoa udent's observation, calculate the enthalpy of dissolution of BaBr,(s) in kJ/mol. Reactio ecific heat of the solution is equal to the specific heat of water. occurs solution
issolves in water, heat may be evolved or absorbed. The heat of dissolution (dissolving) can Thermometer using a coffee cup calorimeter. Cardboard o ry a general chemistry student finds that when 21.37 g of BaBr,(s) are dissolved in 103.30 g mperature of the solution increases from 24.05 to 27.39 °C. Styrofoam li ity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a ment to be 1.77 J/°C. Nested Styrofoa udent's observation, calculate the enthalpy of dissolution of BaBr,(s) in kJ/mol. Reactio ecific heat of the solution is equal to the specific heat of water. occurs solution
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.
Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
Question
Transcribed Image Text:When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution (dissolving) can
be determined using a coffee cup calorimeter.
Thermometer
Cardboard or
Styrofoam lid
In the laboratory a general chemistry student finds that when 12.55 g of BaCl(s) are dissolved in 104.30 g
of water, the temperature of the solution increases from 24.93 to 27.10 °C.
The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a
separate experiment to be 1.51 J/°C.
Nested
Styrofoam cups
Based on the student's observation, calculate the enthalpy of dissolution of BaCl,(s) in kJ/mol.
Reaction
Assume the specific heat of the solution is equal to the specific heat of water.
occurs in
solution.
AHdissolution
kJ/mol
Transcribed Image Text:When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution (dissolving) can
be determined using a coffee cup calorimeter.
Thermometer
Cardboard or
In the laboratory a general chemistry student finds that when 21.37 g of BaBr2(s) are dissolved in 103.30 g
Styrofoam lid
of water, the temperature of the solution increases from 24.05 to 27.39 °C.
The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a
separate experiment to be 1.77 J/°C.
Nested
Styrofoam cups
Based on the student's observation, calculate the enthalpy of dissolution of BaBr2(s) in kJ/mol.
Reaction
Assume the specific heat of the solution is equal to the specific heat of water.
occurs in
solution.
AHdissolution
kJ/mol
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