I want you to calibrate a new bomb calorimeter. For this calibration, we are going to utilize hexane combustion, which proceeds according to the balanced chemical equation below: 2C6H14 (1) + 190₂(g) 12CO₂(g) + 14H₂O(g) ΔΗ = -8326 kJ - Which of the following statements is TRUE? Choose one: The reaction is exothermic. The reaction is endothermic. The reaction is neither exothermic nor endothermic. There is not enough information provided to determine whether the reaction is exothermic or endothermic. If we perform this reaction with 2.32 g of hexane, how much heat is released into the calorimeter by the reaction? Provide your answer in units of J (not kJ), and do not include a positive or negative sign. J What is the heat capacity for the calorimeter, in J/K, if combustion of 2.32 g of hexane in the calorimeter raises the temperature from 26.94 °C to 37.54 °C? J/K Now suppose that we perform a new reaction in this same calorimeter, in which 2 moles of an unknown material undergo combustion, raising the temperature from 28.46 °C to 34.38 °C. What is the enthalpy change associated with this reaction, per mole of the unknown material? J/mol
I want you to calibrate a new bomb calorimeter. For this calibration, we are going to utilize hexane combustion, which proceeds according to the balanced chemical equation below: 2C6H14 (1) + 190₂(g) 12CO₂(g) + 14H₂O(g) ΔΗ = -8326 kJ - Which of the following statements is TRUE? Choose one: The reaction is exothermic. The reaction is endothermic. The reaction is neither exothermic nor endothermic. There is not enough information provided to determine whether the reaction is exothermic or endothermic. If we perform this reaction with 2.32 g of hexane, how much heat is released into the calorimeter by the reaction? Provide your answer in units of J (not kJ), and do not include a positive or negative sign. J What is the heat capacity for the calorimeter, in J/K, if combustion of 2.32 g of hexane in the calorimeter raises the temperature from 26.94 °C to 37.54 °C? J/K Now suppose that we perform a new reaction in this same calorimeter, in which 2 moles of an unknown material undergo combustion, raising the temperature from 28.46 °C to 34.38 °C. What is the enthalpy change associated with this reaction, per mole of the unknown material? J/mol
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
Chapter6: Thermochemistry
Section: Chapter Questions
Problem 112AE: In a bomb calorimeter, the reaction vessel is surrounded by water that must be added for each...
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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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Transcribed Image Text:9
I want you to calibrate a new bomb calorimeter. For this calibration, we are going to utilize hexane combustion, which proceeds
according to the balanced chemical equation below:
2C6H₁4 (1) + 190₂(g) → 12CO₂(g) + 14H₂O(g)
14
ΔΗ = -8326 kJ
Which of the following statements is TRUE?
Choose one:
The reaction is exothermic.
The reaction is endothermic.
The reaction is neither exothermic nor endothermic.
There is not enough information provided to determine whether the reaction is exothermic or endothermic.
If we perform this reaction with 2.32 g of hexane, how much heat is released into the calorimeter by the reaction? Provide your answer
in units of J (not kJ), and do not include a positive or negative sign.
J
What is the heat capacity for the calorimeter, in J/K, if combustion of 2.32 g of hexane in the calorimeter raises the temperature
from 26.94 °C to 37.54 °C?
J/K
Now suppose that we perform a new reaction in this same calorimeter, in which 2 moles of an unknown material undergo combustion,
raising the temperature from 28.46 °C to 34.38 °C. What is the enthalpy change associated with this reaction, per mole of the
unknown material?
J/mol
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