Pls answer number 1 thank you. 1. How much heat is released when 165 g of liquid benzene, CoH6 (1), cools from 78.0°C to 12.0°C? (Sp.heat of C,H6 (1) = 1.74 J/g•°C)2. If 100. grams of liquid water at 100.°C and 200. grams of water at 20.0°C are mixed in an insulatedcontainer, what will the final temperature of the mixture be? (Sp. heat of H2O (1) = 4.18 J/g•°C)3. Using the Clausius-Clapeyron equation determine the vapor pressure of water at 50.0°C. The molar heatof vaporization of water is 40.7 kJ/mol.4. The density of ice is less than that of water, which is rare for a solid. Discuss some situations in life thatwould be different if this were not true.5. Using a phase diagram, explain why the sublimation of ice is not possible at room temperature.

The mass of benzene is = 165 g The decrease in the temperature of the liquid benzene is = 78.0oC to…

Answered: 1. How much heat is released when 165 g…

1. How much heat is released when 165 g of liquid benzene, C6H6 (1), cools from 78.0°C to 12.0°C? (Sp. heat of C,H6 (1) = 1.74 J/g•°C) %3D

Chemistry: An Atoms First Approach

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ISBN:9781305079243

Author:Steven S. Zumdahl, Susan A. Zumdahl

Publisher:Steven S. Zumdahl, Susan A. Zumdahl

Chapter7: Chemical Energy

Section: Chapter Questions

Problem 100AE

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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 answer number 1 thank you.

1. How much heat is released when 165 g of liquid benzene, CoH6 (1), cools from 78.0°C to 12.0°C? (Sp.
heat of C,H6 (1) = 1.74 J/g•°C)
2. If 100. grams of liquid water at 100.°C and 200. grams of water at 20.0°C are mixed in an insulated
container, what will the final temperature of the mixture be? (Sp. heat of H2O (1) = 4.18 J/g•°C)
3. Using the Clausius-Clapeyron equation determine the vapor pressure of water at 50.0°C. The molar heat
of vaporization of water is 40.7 kJ/mol.
4. The density of ice is less than that of water, which is rare for a solid. Discuss some situations in life that
would be different if this were not true.
5. Using a phase diagram, explain why the sublimation of ice is not possible at room temperature.

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