4. In a neutralization reaction in a well-insulated calorimeter, 112.9 g of 1.2915 M NAOH were added to 129.1 g of 1.1294 M HCI. The following data were obtained. Assume the density of each solution is 1.00 g/mL. The temperature of the solution rose 8.10 °C. a. Assuming the calorimeter, thermometer, and stirrer have a negligible impact on the AHran, calculate the AHxn (in kJ) for this reaction. -9 raction =9 sdution b. Calculate the AHrxn per mole of NaOH reacted. c. If the Styrofoam calorimeter (s thermometer (s 0.840 J/g °C) weighs 20.0 g, and the aluminum stirrer (s = 0.900 J/g °C) weighs 10.0 g, calculate the AHren per mole of NaOH reacted. 1.131 J/g °C) weighs 30.0 g, the glass %3D convery 1. The literature value of this reaction is -55.9 kJ/mole. Qualitatively compare the AHren from (c) and (d) and comment on the effects the calorimeter, thermometer, and stirrer have on the AHrxn and if they can be considered negligible in the calculations.
4. In a neutralization reaction in a well-insulated calorimeter, 112.9 g of 1.2915 M NAOH were added to 129.1 g of 1.1294 M HCI. The following data were obtained. Assume the density of each solution is 1.00 g/mL. The temperature of the solution rose 8.10 °C. a. Assuming the calorimeter, thermometer, and stirrer have a negligible impact on the AHran, calculate the AHxn (in kJ) for this reaction. -9 raction =9 sdution b. Calculate the AHrxn per mole of NaOH reacted. c. If the Styrofoam calorimeter (s thermometer (s 0.840 J/g °C) weighs 20.0 g, and the aluminum stirrer (s = 0.900 J/g °C) weighs 10.0 g, calculate the AHren per mole of NaOH reacted. 1.131 J/g °C) weighs 30.0 g, the glass %3D convery 1. The literature value of this reaction is -55.9 kJ/mole. Qualitatively compare the AHren from (c) and (d) and comment on the effects the calorimeter, thermometer, and stirrer have on the AHrxn and if they can be considered negligible in the calculations.
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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.
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I need help answering 4d.
Transcribed Image Text:VOTEXPERIMENT 8
HEATS OF REACTION
4. In a neutralization reaction in a well-insulated calorimeter, 112.9 g of 1.2915 M NaOH
were added to 129.1 g of 1.1294 M HCI. The following data were obtained. Assume
the density of each solution is 1.00 g/mL. The temperature of the solution rose 8.10
°C.
a. Assuming the calorimeter, thermometer, and stirrer have a negligible impact on the
AHrxn, calculate the AHxn (in kJ) for this reaction. -9 rcaction =9
sulution
b. Calculate the AHrxn per mole of NaOH reacted.
c. If the Styrofoam calorimeter (s = 1.131 J/g °C) weighs 30.0 g, the glass
thermometer (s = 0.840 J/g °C) weighs 20.0 g, and the aluminum stirrer (s = 0.900
J/g °C) weighs 10.0 g, calculate the AHren per mole of NaOH reacted.
d. The literature value of this reaction is -55.9 kJ/mole. Qualitatively compare the
AHren from (c) and (d) and comment on the effects the calorimeter, thermometer,
and stirrer have on the AHrxn and if they can be considered negligible in the
calculations.
109
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