calorimetry data O(g) + 50₂(g) → 4CO₂(g) + 4H₂O(g) Be sure any of your answers that are calculated from measured data are rounded to the correct number of significant digits. Note for advanced students: it's possible the student did not do these experiments sufficiently carefully, and the values you calculate may not exactly match published values for this reaction. Is this reaction exothermic, endothermic, or neither? 4 If you said the reaction was exothermic or endothermic, calculate the amount of heat that was released or absorbed by the reaction in the second experiment. Calculate the reaction enthalpy AHxn per mole of C₂H₂O. exothermic O endothermic O neither kJ 0- mol 0/5 X 3 Andrew E OL 3-4 R
calorimetry data O(g) + 50₂(g) → 4CO₂(g) + 4H₂O(g) Be sure any of your answers that are calculated from measured data are rounded to the correct number of significant digits. Note for advanced students: it's possible the student did not do these experiments sufficiently carefully, and the values you calculate may not exactly match published values for this reaction. Is this reaction exothermic, endothermic, or neither? 4 If you said the reaction was exothermic or endothermic, calculate the amount of heat that was released or absorbed by the reaction in the second experiment. Calculate the reaction enthalpy AHxn per mole of C₂H₂O. exothermic O endothermic O neither kJ 0- mol 0/5 X 3 Andrew E OL 3-4 R
General Chemistry - Standalone book (MindTap Course List)
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Chapter6: Thermochemisty
Section: Chapter Questions
Problem 6.109QP: A 21.3-mL sample of 0.977 M NaOH is mixed with 29.5 mL of 0.918 M HCl in a coffee-cup calorimeter...
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Concept explainers
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
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84°F
Sunny
OTHERMOCHEMISTRY
Calculating heat of reaction from bomb calorimetry data
O(g) + 50₂(g) → 4CO₂(g) + 4H₂O (g)
Be sure any of your answers that are calculated from measured data are rounded to the correct number of significant digits.
Note for advanced students: it's possible the student did not do these experiments sufficiently carefully, and the values you calculate may not exactly match
published values for this reaction.
Is this reaction exothermic, endothermic, or neither?
Explanation
If you said the reaction was exothermic or endothermic, calculate the amount of heat that was
released or absorbed by the reaction in the second experiment.
Calculate the reaction enthalpy AHxn per mole of C₂H₂O.
Check
Q Search
LO
exothermic
O endothermic
O neither
ป
kJ
kJ
mol
x10
0/5
X
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16
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Andrew
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© 2023 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibili
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7/16,
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OTHERMOCHEMISTRY
A student runs two experiments with a constant-volume "bomb" calorimeter containing 1200. g of water (see sketch at
right).
Calculating heat of reaction from bomb calorimetry data
First, a 5.000 g tablet of benzoic acid (C6H,CO₂H) is put into the "bomb" and burned completely in an excess of
oxygen. (Benzoic acid is known to have a heat of combustion of 26.454 kJ/g.) The temperature of the water is
observed to rise from 16.00 °C to 38.96 °C over a time of 9.2 minutes.
2
4.
Next, 5.730 g of acetaldehyde (C₂H₂O) are put into the "bomb" and similarly completely burned in an excess of
oxygen. This time the temperature of the water rises from 16.00 °C to 42.19 °C.
84°F
Sunny
Use this information, and any other information you need from the ALEKS Data resource, to answer the questions
below about this reaction:
FI
Explanation
Is this reaction exothermic, endothermic, or neither?
4-
F₂
Check
2C₂H4O(g) + 50₂(g)
4CO₂(g) + 4H₂O(g)
Be sure any of your answers that are calculated from measured data are rounded to the correct number of significant digits.
Note for advanced students: it's possible the student did not do these experiments sufficiently carefully, and the values you calculate may not exactly match
published values for this reaction.
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exothermic
O endothermic
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stirrer
+
chemical reaction
"bomb"
A "bomb" calorimeter.
PrtSc
0
thermometer
Insert
0/5
A
water
Delete
insulation
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4:35 PM
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