Part A CaO can be used as a drying agent. One such application occurs when water is added to dry concrete or cement. The reaction that occurs is Ca0(s) + H20() = Ca(OH): (s) The product is commonly called slaked lime. Assuming the commonly used standard-state temperature of 25°C, calculate ASuntv for this reaction using the data from the table below. Ar H° JK'mol '(kJ mol-') Substance CaO(s) 39.9 -635.1 H20(1) 69.9 - 285.8 Ca(OH);(s) 83.4 - 986.1 Express your answer to three significant figures and include the appropriate units. • View Available Hint(s) Tempjetes Symbole undo redo teset keyboard shortouts Heip Value Units Submit Part B A particular solvent with Avap S" = 112.9 J K-'mol-' and Avap H° = 38.0 kJ mol' is being considered for an experiment. In the experiment, which is to be run at 75 °C, the solvent must not boil. Based on the entropy change of the universe associated with the vaporization reaction, would this solvent be suitable and why or why not? > View Available Hint(s) be suitable because ASuniy >0. O not be suitable because ASuniv >0. The solvent would O be suitable because ASuntv << 0. O not be suitable because ASuniv <0
Part A CaO can be used as a drying agent. One such application occurs when water is added to dry concrete or cement. The reaction that occurs is Ca0(s) + H20() = Ca(OH): (s) The product is commonly called slaked lime. Assuming the commonly used standard-state temperature of 25°C, calculate ASuntv for this reaction using the data from the table below. Ar H° JK'mol '(kJ mol-') Substance CaO(s) 39.9 -635.1 H20(1) 69.9 - 285.8 Ca(OH);(s) 83.4 - 986.1 Express your answer to three significant figures and include the appropriate units. • View Available Hint(s) Tempjetes Symbole undo redo teset keyboard shortouts Heip Value Units Submit Part B A particular solvent with Avap S" = 112.9 J K-'mol-' and Avap H° = 38.0 kJ mol' is being considered for an experiment. In the experiment, which is to be run at 75 °C, the solvent must not boil. Based on the entropy change of the universe associated with the vaporization reaction, would this solvent be suitable and why or why not? > View Available Hint(s) be suitable because ASuniy >0. O not be suitable because ASuniv >0. The solvent would O be suitable because ASuntv << 0. O not be suitable because ASuniv <0
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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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
Transcribed Image Text:Review I Constants | Periodic Table
Part A
CaO can be used as a drying agent. One such application occurs when water is added to dry concrete or cement. The reaction that occurs is
Ca0(s) + H20(0) = Ca(OH)2(s)
The product is commonly called slaked lime.
Assuming the commonly used standard-state temperature of 25°C, calculate ASunty for this reaction using the data from the table below.
Ar H°
[JK'mol (kJ mol-)
Substance
Ca0(s)
39.9
-635.1
H20(1)
Ca(OH)2 (s)
69.9
-285.8
83.4
-986.1
Express your answer to three significant figures and include the appropriate units.
> View Available Hint(s)
Tempjetes Symbole undo rego teset keyboard shortouts Heip
Value
Units
Submit
Part B
A particular solvent with Avan S° = 112.9 JKmol and Avan H° = 38.0 kJ mol is being considered for an experiment. In the experiment, which is to be run at 75 °C, the solvent must not boil. Based on the entropy
change of the universe associated with the vaporization reaction, would this solvent be suitable and why or why not?
• View Available Hint(s)
O be suitable because ASunlv > 0.
not be suitable because ASunir > 0.
The solvent would
O be suitable because ASuniv <0.
O not be suitable because ASuniv <0.
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