2 C,H,0(g) + 50,(8)4 CO2(g) + 4 H,0(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 youcalculate may not exactly match published values for this reaction.exothermicIs this reaction exothermic, endothermic, or neither?endothermicO neitherIf you said the reaction was exothermic or endothermic, calculate the amount of heat that wasreleased or absorbed by the reaction in the second experiment.kJkJCalculate the reaction enthalpy AH,per mole of C,H¸0.rxnmol A student runs two experiments with a constant-volume "bomb" calorimetercontaining 1300. g of water (see sketch at right).thermometerstirrerFirst, a 5.500 g tablet of benzoic acid (CH,CO,H) is put into the "bomb" andwaterburned completely in an excess of oxygen. (Benzoic acid is known to have a heat ofcombustion of 26.454 kJ/g.) The temperature of the water is observed to rise frominsulation23.00 °C to 47.33 °C over a time of 5.8 minutes.Next, 4.150 g of acetaldehyde (C,H,0) are put into the "bomb" and similarlycompletely burned in an excess of oxygen. This time the temperature of the waterrises from 23.00 °C to 42.14 °C.chemical reaction"bomb"A "bomb" calorimeter.Use this information, and any other information you need from the ALEKS Dataresource, to answer the questions below about this reaction:2 C,H,0(g) + 50,(g) →4 CO2(g) + 4 H20(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 youcalculate may not exactly match published values for this reaction.

a) Now, after the combustion of acetaldehyde in bomb calorimeter, the temperature of water rises…

exothermic Is this reaction exothermic, endothermic, or neither? endothermic 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. | kJ kJ Calculate the reaction enthalpy AH, rxn per mole of C,H,0. mol

exothermic Is this reaction exothermic, endothermic, or neither? endothermic 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. | kJ kJ Calculate the reaction enthalpy AH, rxn per mole of C,H,0. 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

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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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

2 C,H,0(g) + 50,(8)
4 CO2(g) + 4 H,0(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.
exothermic
Is this reaction exothermic, endothermic, or neither?
endothermic
O 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.
kJ
kJ
Calculate the reaction enthalpy AH,
per mole of C,H¸0.
rxn
mol

A student runs two experiments with a constant-volume "bomb" calorimeter
containing 1300. g of water (see sketch at right).
thermometer
stirrer
First, a 5.500 g tablet of benzoic acid (CH,CO,H) is put into the "bomb" and
water
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
insulation
23.00 °C to 47.33 °C over a time of 5.8 minutes.
Next, 4.150 g of acetaldehyde (C,H,0) 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 42.14 °C.
chemical reaction
"bomb"
A "bomb" calorimeter.
Use this information, and any other information you need from the ALEKS Data
resource, to answer the questions below about this reaction:
2 C,H,0(g) + 50,(g) →
4 CO2(g) + 4 H20(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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