Write True on the space provided if the statement is true. Write False if the statement is false. ____________1. The spontaneity of a reaction is determined by the enthalpy of the reaction. ____________ 2. The second law of thermodynamics helps keep track of energy flow between the system and surroundings, and also indicates the spontaneity of the process. ____________ 3. All spontaneous reactions are exothermic reactions. ____________ 4. When a reaction mixture is mostly products, the total free energy increases as the reaction proceeds spontaneously in the forward reaction. _____________5. The work done by a spontaneous reaction is always less than the ΔG for the reaction. _____________6. The spontaneity of a reaction also gives an indication of the speed of a reaction. _____________7. Molecular systems tend to move spontaneously to a state of a maximum randomness or disorder. _____________ 8. Energy and enthalpy are the two driving forces for chemical and physical processes. _____________ 9. An endothermic reaction in which the entropy change is negative is considered nonspontaneous. _____________10. The entropy change for evaporation of liquid is positive.
Write True on the space provided if the statement is true. Write False if the statement is false. ____________1. The spontaneity of a reaction is determined by the enthalpy of the reaction. ____________ 2. The second law of thermodynamics helps keep track of energy flow between the system and surroundings, and also indicates the spontaneity of the process. ____________ 3. All spontaneous reactions are exothermic reactions. ____________ 4. When a reaction mixture is mostly products, the total free energy increases as the reaction proceeds spontaneously in the forward reaction. _____________5. The work done by a spontaneous reaction is always less than the ΔG for the reaction. _____________6. The spontaneity of a reaction also gives an indication of the speed of a reaction. _____________7. Molecular systems tend to move spontaneously to a state of a maximum randomness or disorder. _____________ 8. Energy and enthalpy are the two driving forces for chemical and physical processes. _____________ 9. An endothermic reaction in which the entropy change is negative is considered nonspontaneous. _____________10. The entropy change for evaporation of liquid is positive.
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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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
Write True on the space provided if the statement is true. Write False if the statement is false.
____________1. The spontaneity of a reaction is determined by the enthalpy of the reaction.
____________ 2. The second law of thermodynamics helps keep track of energy flow between the system and surroundings, and also indicates the spontaneity of the process.
____________ 3. All spontaneous reactions are exothermic reactions.
____________ 4. When a reaction mixture is mostly products, the total free energy increases as the reaction proceeds spontaneously in the forward reaction.
_____________5. The work done by a spontaneous reaction is always less than the ΔG for the reaction.
_____________6. The spontaneity of a reaction also gives an indication of the speed of a reaction.
_____________7. Molecular systems tend to move spontaneously to a state of a maximum randomness or disorder.
_____________ 8. Energy and enthalpy are the two driving forces for chemical and physical processes.
_____________ 9. An endothermic reaction in which the entropy change is negative is considered nonspontaneous.
_____________10. The entropy change for evaporation of liquid is positive.
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