Part A A total of 2.00 mol of a compound is allowed to react with water in a foam coffee cup and the reaction produces 174 g of solution. The reaction caused the temperature of the solution to rise from 21.00 to 24.70 °C. What is the enthalpy of this reaction? Assume that no heat is lost to the surroundings or to the coffee cup itself and that the specific heat of the solution is the same as that of pure water. Enter your answer in kilojoules per mole of compound to three significant figures. > View Available Hintis)
Part A A total of 2.00 mol of a compound is allowed to react with water in a foam coffee cup and the reaction produces 174 g of solution. The reaction caused the temperature of the solution to rise from 21.00 to 24.70 °C. What is the enthalpy of this reaction? Assume that no heat is lost to the surroundings or to the coffee cup itself and that the specific heat of the solution is the same as that of pure water. Enter your answer in kilojoules per mole of compound to three significant figures. > View Available Hintis)
Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter4: Energy And Chemical Reactions
Section: Chapter Questions
Problem 89QRT
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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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Transcribed Image Text:I Review | Constants | Periodic Table
Calorimetry is a method used to measure enthalpy, or heat, changes
that occur during chemical processes. Two common calorimeters are
constant-pressure calorimeters and constant-volume (or "bomb")
Part A
calorimeters.
A simple constant-pressure calorimeter can be made from a foam
coffee cup and a thermometer; energy changes in a reaction are
observed via a temperature change of the solution in the cup. Bomb
calorimeters are used to measure combustion and other gas-
producing reactions, where the reaction is observed in a strong, sealed
vessel. The idea behind calorimeters is that if they are sufficiently
insulated from the outside environment, any energy gained or lost in
the chemical reaction will be directly observable as a temperature
and/or pressure change in the calorimeter.
A total of 2.00 mol of a compound is allowed to react with water in a foam coffee cup and the reaction produces 174 g of solution. The reaction caused the temperature of
the solution to rise from 21.00 to 24.70 °C. What is the enthalpy of this reaction? Assume that no heat is lost to the surroundings or to the coffee cup itself and that the
specific heat of the solution is the same as that of pure water.
Enter your answer in kilojoules per mole of compound to three significant figures.
• View Available Hint(s)
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