pls help 21. Which of the following reactions releases most energy to thesurroundings?Reaction energy change = +600 kJ/molReaction energy change = -500 kJ/molReaction energy change = +1500 kJ/molReaction energy change = -10 kJ/mol%3D22. What is the specific heat of a substance if 2.41 x 104 J are needed tochange the temperature of 105 g of it from 25°C to 250°C? *9.18 x 10-4 J/g'c1.02 x 10-4 J/g°C0.918 J/g°C1.02 J/g°C

Answered: 21. Which of the following reactions…

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Chemistry

21. Which of the following reactions releases most energy to the surroundings? *

Chemistry

9th Edition

ISBN:9781133611097

Author:Steven S. Zumdahl

Publisher:Steven S. Zumdahl

Chapter6: Thermochemistry

Section: Chapter Questions

Problem 16Q: For the reaction HgO(s)Hg(l)+12O2(g),H=+90.7kJ: a.What quantity of heat is required to produce 1...

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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

pls help

21. Which of the following reactions releases most energy to the
surroundings?
Reaction energy change = +600 kJ/mol
Reaction energy change = -500 kJ/mol
Reaction energy change = +1500 kJ/mol
Reaction energy change = -10 kJ/mol
%3D
22. What is the specific heat of a substance if 2.41 x 104 J are needed to
change the temperature of 105 g of it from 25°C to 250°C? *
9.18 x 10-4 J/g'c
1.02 x 10-4 J/g°C
0.918 J/g°C
1.02 J/g°C

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