
(a)
Interpretation :
Whether boiling ethanol is exothermic or not is to be explained.
Concept Introduction :
Any change in matter is accompanied by a change in energy. Many
(a)

Answer to Problem 5E
Boiling ethanol is not an exothermic process.
Explanation of Solution
When heat is transferred out of the system to the surroundings, the process is called exothermic and when heat is transferred from the surroundings to the system the process is called endothermic.
Boiling ethanol is not an exothermic process because boiling draws heat from the surrounding rather than releasing heat. During boiling energy is going into the substance. All the energy is used to break the intermolecular forces of attraction so that the molecules can move freely as a gas. Hence boiling ethanol is an endothermic process.
(b)
Interpretation :
Whether freezing liquid mercury is exothermic or not is to be explained.
Concept Introduction :
When a substance changes phase from a solid to a liquid or from a liquid to a gas, a certain amount of energy is transferred to the substance from the surroundings. When a substance changes phase from a gas to a liquid or from a liquid to a solid, a certain amount of energy is transferred from the substance to the surroundings.
(b)

Answer to Problem 5E
Freezing liquid mercury is an exothermic process.
Explanation of Solution
When heat is transferred out of the system to the surroundings, the process is called exothermic and when heat is transferred from the surroundings to the system the process is called endothermic.
Freezing liquid mercury is an exothermic process because freezingreleases heat to the surrounding rather than absorbing heat. During freezing or cooling energy is released into the surrounding. Energy is taken away from the molecules and given out to the surroundings so that the particles come closer and have strong intermolecular force of attraction. Hence freezing liquid mercury is an exothermic process.
(c)
Interpretation :
Whether subliming carbon dioxide is exothermic or not is to be explained.
Concept Introduction :
Any change in matter is accompanied by a change in energy. Many chemical reactions result in products that are hotter or colder than the reactants. Chemists have categorized chemical changes according to heat transfer. Heat is a transfer of energy due to temperature differences. There are two types of chemical changes; endothermic and exothermic changes.
(c)

Answer to Problem 5E
Subliming carbon dioxide is not an exothermic process.
Explanation of Solution
When heat is transferred out of the system to the surroundings, the process is called exothermic and when heat is transferred from the surroundings to the system the process is called endothermic.
Subliming carbon dioxide is not an exothermic process because sublimation draws heat from the surrounding rather than releasing heat. During sublimation, the phase changes from solid to gas and so energy is going into the substance. All the energy is used to break the intermolecular forces of attraction so that the molecules can move freely as a gas. Hence subliming carbon dioxide is an endothermic process.
Chapter U5 Solutions
Living by Chemistry
Additional Science Textbook Solutions
Microbiology: An Introduction
Chemistry: The Central Science (14th Edition)
Genetic Analysis: An Integrated Approach (3rd Edition)
College Physics: A Strategic Approach (3rd Edition)
Organic Chemistry (8th Edition)
Chemistry: An Introduction to General, Organic, and Biological Chemistry (13th Edition)
- consider the rate of the reaction below to be r. Whats the rate after each reaction? Br + NaCN CN + NaBr a. Double the concentration of alkyl bromide b. Halve the concentration of the electrophile & triple concentration of cyanide c. Halve the concentration of alkyl chloridearrow_forwardPredict the organic reactant that is involved in the reaction below, and draw the skeletal ("line") structures of the missing organic reactant. Please include all steps & drawings & explanations.arrow_forwardWhat are the missing reagents for the spots labeled 1 and 3? Please give a detailed explanation and include the drawings and show how the synthesis proceeds with the reagents.arrow_forward
- What is the organic molecule X of the following acetal hydrolysis? Please draw a skeletal line structure and include a detailed explanation and drawing of how the mechanism proceeds. Please include any relevant information that is needed to understand the process of acetal hydrolysis.arrow_forwardWhat are is the organic molecule X and product Y of the following acetal hydrolysis? Please draw a skeletal line structure and include a detailed explanation and drawing of how the mechanism proceeds. Please include any relevant information that is needed to understand the process of acetal hydrolysis.arrow_forwardAt 300 K, in the decomposition reaction of a reactant R into products, several measurements of the concentration of R over time have been made (see table). Without using graphs, calculate the order of the reaction. t/s [R]/(mol L-1) 0 0,5 171 0,16 720 0,05 1400 0,027arrow_forward
- Predict the organic products that form in the reaction below, and draw the skeletal ("line") structures of the missing organic products. Please include all steps & drawings & explanations.arrow_forwardWhat are the missing reagents for the spots labeled 1 and 3? Please give a detailed explanation and include the drawings and show how the synthesis proceeds with the reagents.arrow_forwardWhat are the products of the following acetal hydrolysis? Please draw a skeletal line structure and include a detailed explanation and drawing of how the mechanism proceeds. Please include any relevant information that is needed to understand the process of acetal hydrolysis.arrow_forward
- What would happen if you added the HCI to the Grignard reagent before adding benzophenone? Draw a reaction mechanism to support your answer.arrow_forwardAt 300 K, in the decomposition reaction of a reactant R into products, several measurements of the concentration of R over time have been made (see table). Calculate the order of the reaction. t/s [R]/ (mol L-1) 0 0,5 171 0,16 720 0,05 1400 0,027arrow_forwardWrite the correct IUPAC names of the molecules in the picturearrow_forward
- ChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage LearningChemistryChemistryISBN:9781259911156Author:Raymond Chang Dr., Jason Overby ProfessorPublisher:McGraw-Hill EducationPrinciples of Instrumental AnalysisChemistryISBN:9781305577213Author:Douglas A. Skoog, F. James Holler, Stanley R. CrouchPublisher:Cengage Learning
- Organic ChemistryChemistryISBN:9780078021558Author:Janice Gorzynski Smith Dr.Publisher:McGraw-Hill EducationChemistry: Principles and ReactionsChemistryISBN:9781305079373Author:William L. Masterton, Cecile N. HurleyPublisher:Cengage LearningElementary Principles of Chemical Processes, Bind...ChemistryISBN:9781118431221Author:Richard M. Felder, Ronald W. Rousseau, Lisa G. BullardPublisher:WILEY





