Ethanol, a common ingredient in many cosmetics and beauty products has a chemical formula of CH3CH20H. When ethanol undergoes combustion, it produces carbon dioxide and water vapor. Write the balance chemical reaction and calculate the enthalpy change for the chemical reaction. Use the table below for the values of standard enthalpy of formation of the compounds present in the reaction. Substance CH3CH20H( 02(g) CO2(9) H20(9) AH (kI/moD -277.7 -393.5 -241.8

Ethanol, a common ingredient in many cosmetics and beauty products has a chemical formula of CH3CH20H. When ethanol undergoes combustion, it produces carbon dioxide and water vapor. Write the balance chemical reaction and calculate the enthalpy change for the chemical reaction. Use the table below for the values of standard enthalpy of formation of the compounds present in the reaction. Substance CH3CH20H( 02(g) CO2(9) H20(9) AH (kI/moD -277.7 -393.5 -241.8

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

8. Ethanol, a common ingredient in many cosmetics and beauty products has a
chemical formula of CH,CH,OHm: When ethanol undergoes combustion, it
produces carbon dioxide and water vapor. Write the balance chemical reaction and
calculate the enthalpy change for the chemical reaction. Use the table below for
the values of standard enthalpy of formation of the compounds present in the
reaction.
CH3CH20H(1)
0 2(g)
CO2(g)
H20(g)
Substance
-393.5
-241.8
-277.7
AHG(kJ/mol)

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