Thermometer Ignition wires heat Stirrer sample A bomb calorimeter, or a constant volume calorimeter, is a device often used to determine the heat of combustion of fuels and the energy content of foods. In an experiment, a 0.4241 g sample of diphenylacetylene (C14H10) is burned completely in a bomb calorimeter. The calorimeter is surrounded by 1.158×10 g of water. During the combustion Water the temperature increases from 21.80 to 24.74 °C. The heat capacity of water is 4.184 J gl°c-!. The heat capacity of the calorimeter was determined in a previous experiment to be 785.1 J/°C. Assuming that no energy is lost to the surroundings, calculate the molar heat of combustion of diphenylacetylene based on these data. C14H10(s) + (33/2) O2(g) 5 H2O(1) + 14 CO2(g) + Energy Insulated outside chamber Sample dish Burning sample Steel bomb Molar Heat of Combustion = kJ/mol animate
Thermometer Ignition wires heat Stirrer sample A bomb calorimeter, or a constant volume calorimeter, is a device often used to determine the heat of combustion of fuels and the energy content of foods. In an experiment, a 0.4241 g sample of diphenylacetylene (C14H10) is burned completely in a bomb calorimeter. The calorimeter is surrounded by 1.158×10 g of water. During the combustion Water the temperature increases from 21.80 to 24.74 °C. The heat capacity of water is 4.184 J gl°c-!. The heat capacity of the calorimeter was determined in a previous experiment to be 785.1 J/°C. Assuming that no energy is lost to the surroundings, calculate the molar heat of combustion of diphenylacetylene based on these data. C14H10(s) + (33/2) O2(g) 5 H2O(1) + 14 CO2(g) + Energy Insulated outside chamber Sample dish Burning sample Steel bomb Molar Heat of Combustion = kJ/mol animate
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
Chapter6: Thermochemistry
Section: Chapter Questions
Problem 112AE: In a bomb calorimeter, the reaction vessel is surrounded by water that must be added for each...
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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
Transcribed Image Text:Thermometer
Ignition
wires
heat
Stirrer
sample
A bomb calorimeter, or a constant volume calorimeter, is a device often used to determine the heat
of combustion of fuels and the energy content of foods.
In an experiment, a 0.4241 g sample of diphenylacetylene (C14H10) is burned completely in a
bomb calorimeter. The calorimeter is surrounded by 1.158×10 g of water. During the combustion
the temperature increases from 21.80 to 24.74 °C. The heat capacity of water is 4.184 J gl°c-!.
Water
The heat capacity of the calorimeter was determined in a previous experiment to be 785.1 J/°C.
Assuming that no energy is lost to the surroundings, calculate the molar heat of combustion of
diphenylacetylene based on these data.
C14H10(s) + (33/2) O2(g) 5 H2O(1) + 14 CO2(g) + Energy
Insulated
outside
chamber
Sample
dish
Burning
sample
Steel
bomb
Molar Heat of Combustion =
kJ/mol
Combustion (bomb) calorimeter.
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