The enthalpy variation of the system can be described as the succession of three phenomenathat add up:- A change in the temperature of the mass m¡ of hot water which goes from the temperature0, to the final temperature OFAH, = m1CH,0(0p – 01) (2)CH20 = heat capacity of the water = 4.18 J g-' K-1= mass of the hot water solutionm1- A change in temperature of the cold-water mass m2 from 02 to the final temperature 0p04: Write the variation of enthalpy AH2 associated to this transformation (relation 3).

The variation in enthalpy expression for change in temperature of hot water is given . Now, we need…

Answered: - A change in temperature of the…

- A change in temperature of the cold-water mass m2 from 02 to the final temperature 0p 04: Write the variation of enthalpy AH2 associated to this transformation (relation 3).

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter12: Thermodynamic Processes And Thermochemistry

Section: Chapter Questions

Problem 13P

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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

The enthalpy variation of the system can be described as the succession of three phenomena
that add up:
- A change in the temperature of the mass m¡ of hot water which goes from the temperature
0, to the final temperature OF
AH, = m1CH,0(0p – 01) (2)
CH20 = heat capacity of the water = 4.18 J g-' K-1
= mass of the hot water solution
m1
- A change in temperature of the cold-water mass m2 from 02 to the final temperature 0p
04: Write the variation of enthalpy AH2 associated to this transformation (relation 3).

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