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 0.5650 g sample of quinizarin (C14H8O4) is burned completely in a bomb calorimeter. The calorimeter is surrounded by 1.187×10³3 g of water. During the combustion the temperature increases from 23.98 to 26.55 °C. The heat capacity of water is 4.184 J glºC1. The heat capacity of the calorimeter was determined in a previous experiment to be 770.8 J/°C. Assuming that no energy is lost to the surroundings, calculate the molar heat of combustion of quinizarin based on these data. C14H804(s) + 1402(g) → 4 H20(1) + 14 CO2(g) + Energy
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 0.5650 g sample of quinizarin (C14H8O4) is burned completely in a bomb calorimeter. The calorimeter is surrounded by 1.187×10³3 g of water. During the combustion the temperature increases from 23.98 to 26.55 °C. The heat capacity of water is 4.184 J glºC1. The heat capacity of the calorimeter was determined in a previous experiment to be 770.8 J/°C. Assuming that no energy is lost to the surroundings, calculate the molar heat of combustion of quinizarin based on these data. C14H804(s) + 1402(g) → 4 H20(1) + 14 CO2(g) + Energy
Chemistry
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Chapter6: Thermochemistry
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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.
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A bomb calorimeter, or a constant volume calorimeter, is a device often used to determine the heat of combustion of
sample
fuels and the energy content of foods.
In an experiment, a 0.5650 g sample of quinizarin (C14H804) is burned completely in a bomb calorimeter. The
calorimeter is surrounded by 1.187×103 g of water. During the combustion the temperature increases from 23.98 to
Water
26.55 °C. The heat capacity of water is 4.184 J gloC1.
The heat capacity of the calorimeter was determined in a previous experiment to be 770.8 J/°C.
Assuming that no energy is lost to the surroundings, calculate the molar heat of combustion of quinizarin based on
these data.
C14H804(s) + 1402(g) → 4 H20(1) + 14 CO2(g) + Energy
Sample
dish
Burning
sample
Steel
bomb
Insulated
outside
chamber
Molar Heat of Combustion =
kJ/mol
Combustion (bomb) calorimeter.
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Transcribed Image Text:History
Bookmarks
Window
Help
Sun Mar 27 10:53 PM
cvg.cengagenow.com
中
[References]
Use the References to access important values if needed for this question.
Ignition
wires
heat
Thermometer
Stirrer
A bomb calorimeter, or a constant volume calorimeter, is a device often used to determine the heat of combustion of
sample
fuels and the energy content of foods.
In an experiment, a 0.5650 g sample of quinizarin (C14H804) is burned completely in a bomb calorimeter. The
calorimeter is surrounded by 1.187×103 g of water. During the combustion the temperature increases from 23.98 to
Water
26.55 °C. The heat capacity of water is 4.184 J gloC1.
The heat capacity of the calorimeter was determined in a previous experiment to be 770.8 J/°C.
Assuming that no energy is lost to the surroundings, calculate the molar heat of combustion of quinizarin based on
these data.
C14H804(s) + 1402(g) → 4 H20(1) + 14 CO2(g) + Energy
Sample
dish
Burning
sample
Steel
bomb
Insulated
outside
chamber
Molar Heat of Combustion =
kJ/mol
Combustion (bomb) calorimeter.
Submit Answer
Try Another Version
1 item attempt remaining
Previous
Next
Cengage Learning | Cengage Technical Support
MAR
OL
étv
27
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