6CO2(g) + 6H2O(I) C,H12O6(8) + 60>(g) (a) How would you determine experimentally the AHan value for this reaction? (b) Solar radiation produces about 7.0 x 1014 kg of glucose a year on Earth. What is the corresponding AH° change?

6CO2(g) + 6H2O(I) C,H12O6(8) + 60>(g) (a) How would you determine experimentally the AHan value for this reaction? (b) Solar radiation produces about 7.0 x 1014 kg of glucose a year on Earth. What is the corresponding AH° change?

Chemistry: Principles and Reactions

8th Edition

ISBN:9781305079373

Author:William L. Masterton, Cecile N. Hurley

Publisher:William L. Masterton, Cecile N. Hurley

Chapter8: Thermochemistry

Section: Chapter Questions

Problem 45QAP: Use the appropriate tables to calculate H for (a) the reaction between copper(II) oxide and carbon...

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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

5.127 Photosynthesis produces glucose (C6H12O6) and oxygen from carbon dioxide and water:

6CO2(g) + 6H2O(I) C,H12O6(8) + 60>(g)
(a) How would you determine experimentally the AHan
value for this reaction? (b) Solar radiation produces
about 7.0 x 1014 kg of glucose a year on Earth. What is
the corresponding AH° change?

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