2C₂H₂(g) + 50₂(g) → 4CO₂(g) + 2H₂O (8) Be sure any of your answers that are calculated from measured data are rounded to the correct number Note for advanced students: it's possible the student did not do these experiments sufficiently carefully, 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 C₂H₂. significant digits. and the values you calculate may not exactly match O exothermic O endothermic O neither 0 kJ kJ mol 0 x10 X S

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2C₂H₂(g) + 50₂ (g)
4CO₂(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.
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 C₂H₂.
rxn
7
exothermic
endothermic
neither
kJ
kJ
mol
x10
X
Ś
Transcribed Image Text:2C₂H₂(g) + 50₂ (g) 4CO₂(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. 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 C₂H₂. rxn 7 exothermic endothermic neither kJ kJ mol x10 X Ś
A student runs two experiments with a constant-volume "bomb" calorimeter containing 1400. g of water (see sketch at
right).
First, a 7.500 g tablet of benzoic acid (CHCO₂H) is put into the "bomb" and burned completely in an excess of
5
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 55.96 °C over a time of 13.8 minutes.
Next, 4.350 g of acetylene (C₂H₂) 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 56.46 °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?
exothermic
endothermic
stirrer
neither
thermometer
chemical reaction
2C₂H₂(g) + 50₂(g)
4CO₂(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.
"bomb"
A "bomb" calorimeter.
x10
water
X
insulation
Ś
?
000
18
Ar
8.
Transcribed Image Text:A student runs two experiments with a constant-volume "bomb" calorimeter containing 1400. g of water (see sketch at right). First, a 7.500 g tablet of benzoic acid (CHCO₂H) is put into the "bomb" and burned completely in an excess of 5 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 55.96 °C over a time of 13.8 minutes. Next, 4.350 g of acetylene (C₂H₂) 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 56.46 °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? exothermic endothermic stirrer neither thermometer chemical reaction 2C₂H₂(g) + 50₂(g) 4CO₂(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. "bomb" A "bomb" calorimeter. x10 water X insulation Ś ? 000 18 Ar 8.
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