Use this information, and any other information you need from the ALEKS Data resource, to answer the questions below about this reaction: C₂H₂(g) + 30₂(g) → 2CO₂(g) + 2 H₂O(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 exactl 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 AHxn per mole of C₂H4. O exothermic O endothermic O neither kJ 0 kJ "bomb" A "bomb" calorimeter. mol 2 x10 X

Chemistry
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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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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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A student runs two experiments with a constant-volume "bomb" calorimeter containing 1200. g of water (see sketch at
right).
First, a 8.000 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 23.00 °C to 60.52 °C over a time of 8.0 minutes.
Next, 4.290 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 23.00 °C to 62.10 °C.
Use this information, and any other information you need from the ALEKS Data resource, to answer the questions below
about 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
rxn per mole of C₂H₁.
exothermic
C₂H₂(g) + 30₂ (g). 2CO₂(g) + 2 H₂O(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.
endothermic
neither
|| kJ
stirrer
kJ
mol
thermometer
chemical reaction.
"bomb"
A "bomb" calorimeter.
x10
water
x
insulation
Transcribed Image Text:A student runs two experiments with a constant-volume "bomb" calorimeter containing 1200. g of water (see sketch at right). First, a 8.000 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 23.00 °C to 60.52 °C over a time of 8.0 minutes. Next, 4.290 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 23.00 °C to 62.10 °C. Use this information, and any other information you need from the ALEKS Data resource, to answer the questions below about 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 rxn per mole of C₂H₁. exothermic C₂H₂(g) + 30₂ (g). 2CO₂(g) + 2 H₂O(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. endothermic neither || kJ stirrer kJ mol thermometer chemical reaction. "bomb" A "bomb" calorimeter. x10 water x insulation
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