NB Assume the densities of all solutions are 1.0 g/mL and their specific heat capacities 4.184 J/g .K RUN 1 Volume of tap water 50.0 mL 5.09 g Mass of KCI Initial Temperature of water, Ti 13.5 °C Final temperature of water, Tr 9.0 °C Change in temperature, AT RUN 2 Volume of tap water 50.0 mL Mass of KCI 5.17 g Initial Temperature of water, Ti 14.5°C Final temperature of water, Tr 9.5°C Change in temperature, AT Given: Molar mass of KCl: 74.55 g mol-1 RUN 1 Calculation of q, in J (qr = [Don't round] RUN 2 Calculation of q, in J (q, = – ąsoln) qsoln) [Don't round] Calculation of Enthalpy Change, AH in kJ mol-1 [Don't round] Calculation of Enthalpy Change, AH in kJ mol-1 [Don't round]
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.
![NB Assume the densities of all solutions are 1.0 g/mL and their specific heat capacities 4.184 J/g .K
RUN 1
Volume of tap water
50.0 mL
5.09 g
Mass of KCI
Initial Temperature of water, Ti
13.5 °C
Final temperature of water, Tr
9.0 °C
Change in temperature, AT
RUN 2
Volume of tap water
50.0 mL
Mass of KCI
5.17 g
Initial Temperature of water, Ti
14.5°C
Final temperature of water, Tr
9.5°C
Change in temperature, AT
Given: Molar mass of KCl: 74.55 g mol-1
RUN 1
Calculation of q, in J (qr =
[Don't round]
RUN 2
Calculation of q, in J (q, = – ąsoln)
qsoln)
[Don't round]
Calculation of Enthalpy Change, AH in kJ mol-1
[Don't round]
Calculation of Enthalpy Change, AH in kJ mol-1
[Don't round]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F55a833aa-184f-434b-af3c-76ba8618462a%2F0c6593e6-2b25-42fe-b6d4-92948dc71382%2Fvq6g8je_processed.png&w=3840&q=75)
![Assume the densities of all solutions are 1.000 g/mL and their specific heat capacities 4.184 J/g .K
PART I
Reaction equation:
Volume of 2.0 M HCI
25.0 mL
Number of moles of HCI
Temperature of HCI
14.0 °C
Volume of 2.0 M NH4OH
25.0 mL
Number of moles of NH4OH
Temperature of NH4OH
14.0 °C
Initial Temperature, Ti
14.0 °C
Final Temperature, Tr
24.0 °C
Change in temperature, AT
Calculation of q, in J (q, = - 4soln)
[Don't round]
What is the enthalpy change (AH) in kJ mol-1, when 1 mol of acid is neutralized?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F55a833aa-184f-434b-af3c-76ba8618462a%2F0c6593e6-2b25-42fe-b6d4-92948dc71382%2Fmt64jm_processed.png&w=3840&q=75)
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