Substance AH, AgCl AgCN HCl -129.888 kJ/mol 141.8 kJ/mol -171.728 kJ/mol HCN 108.5 kJ/mol HCl + AgCN → HCN + AgCl Use the formula to figure out if this reaction endothermic or exothermic? ΔΗrχη-ΣΔΗ products -ΣΔΗ reactants %3D endothermic exothermic not enough information to tell neither

Substance AH, AgCl AgCN HCl -129.888 kJ/mol 141.8 kJ/mol -171.728 kJ/mol HCN 108.5 kJ/mol HCl + AgCN → HCN + AgCl Use the formula to figure out if this reaction endothermic or exothermic? ΔΗrχη-ΣΔΗ products -ΣΔΗ reactants %3D endothermic exothermic not enough information to tell neither

Introductory Chemistry For Today

8th Edition

ISBN:9781285644561

Author:Seager

Publisher:Seager

Chapter8: Reaction Rates And Equilibrium

Section: Chapter Questions

Problem 8.75E

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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

Substance
ΔΗ,
AgCl
AGCN
-129.888 kJ/mol
141.8 kJ/mol
HCl
-171.728 kJ/mol
НCN
108.5 kJ/mol
HCl + AgCN – HCN + AgCl
Use the formula to figure out if this reaction endothermic or exothermic?
ΔΗΓχη- ΣΔΗ products -ΣΔΗ re actants
endothermic
exothermic
not enough information to tell
O neither

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