Use the following data for Problems 2-22 through2-26.A compound hasA molecular weight of 50 lb /lb-mol.A normal melting point of 50°F.A normal boiling point of 150°F.A constant heat capacity in the solid phase ofĈ= 0.7 BTU/lb.°R.PmA constant heat capacity in the liquid phase ofĈ= 0.85 BTU/lb °R.mA constant density in the solid phase ofp = 40 lb /ft³.mA constant density in the liquid phase ofp = 30 lb /ft³.An ideal gas heat capacity of C=17/1200 +T²x 10-6BTU/lb ºR with T representing the tem-perature in°R.m 2-26. The compound is initially at 175°F. If the pressure isconstant at P = 1 atm throughout the process, and thespecific internal energy of the compound is decreasedby 150 BTU/lb, what is the final temperature?m

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The compound is initially at 175°F. If the pressure is constant at P = 1 atm throughout the process, and the specific internal energy of the compound is decreased by 150 BTU/lb, what is the final temperature?

The compound is initially at 175°F. If the pressure is constant at P = 1 atm throughout the process, and the specific internal energy of the compound is decreased by 150 BTU/lb, what is the final temperature?

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 11QAP: When one mol of KOH is neutralized by sulfuric acid, q=56 kJ. (This is called the heat of...

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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

Use the following data for Problems 2-22 through
2-26.
A compound has
A molecular weight of 50 lb /lb-mol.
A normal melting point of 50°F.
A normal boiling point of 150°F.
A constant heat capacity in the solid phase of
Ĉ= 0.7 BTU/lb.°R.
P
m
A constant heat capacity in the liquid phase of
Ĉ= 0.85 BTU/lb °R.
m
A constant density in the solid phase of
p = 40 lb /ft³.
m
A constant density in the liquid phase of
p = 30 lb /ft³.
An ideal gas heat capacity of C=17/1200 +
T²x 10-6BTU/lb ºR with T representing the tem-
perature in°R.
m

2-26. The compound is initially at 175°F. If the pressure is
constant at P = 1 atm throughout the process, and the
specific internal energy of the compound is decreased
by 150 BTU/lb, what is the final temperature?
m

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