A student runs two experiments with a constant-volume "bomb" calorimeter containing 1100. g of water (see sketch a right). First, a 7.500 g tablet of benzoic acid (CH₂CO₂H) 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 24.00 °C to 65.95 °C over a time of 6.6 minutes. Next, 5.060 g of ethylene (C₂H4) are put into the "bomb" and similarly completely burned in an excess of oxygen. This time the temperature of the water rises from 24.00 °C to 77.48 °C. Use this information, and any other information you need from the ALEKS Data resource, to answer the questions below about this reaction: C.H.(g) + 30. (g) 260.(g) + 2H.0(g)
A student runs two experiments with a constant-volume "bomb" calorimeter containing 1100. g of water (see sketch a right). First, a 7.500 g tablet of benzoic acid (CH₂CO₂H) 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 24.00 °C to 65.95 °C over a time of 6.6 minutes. Next, 5.060 g of ethylene (C₂H4) are put into the "bomb" and similarly completely burned in an excess of oxygen. This time the temperature of the water rises from 24.00 °C to 77.48 °C. Use this information, and any other information you need from the ALEKS Data resource, to answer the questions below about this reaction: C.H.(g) + 30. (g) 260.(g) + 2H.0(g)
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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
Transcribed Image Text:A student runs two experiments with a constant-volume "bomb" calorimeter containing 1100. g of water (see sketch at
right).
First, a 7.500 g tablet of benzoic acid (CH-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 24.00 °C to 65.95 °C over a time of 6.6 minutes.
Next, 5.060 g of ethylene (C₂H4) are put into the "bomb" and similarly completely burned in an excess of oxygen.
This time the temperature of the water rises from 24.00 °C to 77.48 °C.
Use this information, and any other information you need from the ALEKS Data resource, to answer the questions
below about this reaction:
1
stirrer
n
thermometer
chemical reaction
"bomb"
A "bomb" calorimeter.
water
insulation
C₂H₂(g) + 30₂(g)
2CO₂(g) + 2H₂O(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.

Transcribed Image Text:C₂H₂(g) + 30₂(g) 2CO₂(g) + 2H₂O (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?
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 ΔΗ per mole of C₂H4.
rxn
OOO
exothermic
endothermic
neither
KJ
kJ
mol
x10
×
Expert Solution

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Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step 1: Interpretation of problem statement
VIEWStep 2: Determine whether reaction is exothermic, endothermic or neither.
VIEWStep 3: Determination of Heat of reaction, bomb calorimeter and water for the first reaction
VIEWStep 4: Determination of Specific heat capacity of bomb calorimeter
VIEWStep 5: Determination of heat released in second experiment =
VIEWStep 6: Determination of reaction enthalpy per mole ethylene
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