A total of 2.00 mol of a compound is allowed to react with water in a foam coffee cup and the reaction produces 175 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) AH = kJ/mol Submit

A total of 2.00 mol of a compound is allowed to react with water in a foam coffee cup and the reaction produces 175 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) AH = kJ/mol Submit

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

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") calorimeters.
Part A
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
A total of 2.00 mol of a compound is allowed to react with water in a foam coffee cup and the reaction produces 175 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.
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.
• View Available Hint(s)
AH = kJ/mol
Submit

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