Concept explainers
(a)
Interpretation: The effect on temperature on the stretching of rubber band is to be stated and whether the stretching is an exothermic or endothermic process is to be explained in terms of intermolecular forces. Also, the sign of
Concept introduction: Rubber is a
To determine: The effect on temperature on the stretching of rubber band.
(b)
Interpretation: The effect on temperature on the stretching of rubber band is to be stated and whether the stretching is an exothermic or endothermic process is to be explained in terms of intermolecular forces. Also, the sign of
Concept introduction: Rubber is a polymer (long chain molecules) made from organic compound isoprene. The molecules in rubber are arranged in a tangled up position than an aligned position and due to thermal motion they lose their alignment and go back to their tangled state and this is called an elastic contact caused by an entropic force.
To determine: The stretching is an exothermic or endothermic process.
(c)
Interpretation: The effect on temperature on the stretching of rubber band is to be stated and whether the stretching is an exothermic or endothermic process is to be explained in terms of intermolecular forces. Also, the sign of
Concept introduction: Rubber is a polymer (long chain molecules) made from organic compound isoprene. The molecules in rubber are arranged in a tangled up position than an aligned position and due to thermal motion they lose their alignment and go back to their tangled state and this is called an elastic contact caused by an entropic force.
To determine: The above results in terms of intermolecular forces.
(d)
Interpretation: The effect on temperature on the stretching of rubber band is to be stated and whether the stretching is an exothermic or endothermic process is to be explained in terms of intermolecular forces. Also, the sign of
Concept introduction: Rubber is a polymer (long chain molecules) made from organic compound isoprene. The molecules in rubber are arranged in a tangled up position than an aligned position and due to thermal motion they lose their alignment and go back to their tangled state and this is called an elastic contact caused by an entropic force.
To determine: The sign of
(e)
Interpretation: The effect on temperature on the stretching of rubber band is to be stated and whether the stretching is an exothermic or endothermic process is to be explained in terms of intermolecular forces. Also, the sign of
Concept introduction: Rubber is a polymer (long chain molecules) made from organic compound isoprene. The molecules in rubber are arranged in a tangled up position than an aligned position and due to thermal motion they lose their alignment and go back to their tangled state and this is called an elastic contact caused by an entropic force.
To determine: The molecular explanation for the sign of
Want to see the full answer?
Check out a sample textbook solutionChapter 22 Solutions
Chemistry
- What is a driving force? Name two common and important driving forces, and give an example of each. What is entropy? Although the total energy of the universe is constant, is the entropy of the universe constant? What is a spontaneous process?arrow_forwardDecide whether the statement is True or Falsearrow_forwardpredict reN 1. HNO3, H2SO4 2. Br2, FeBr3 a. 3. Mg 4. CO2 5. H+ heat b. HO 1. SO3, H2SO4 2. Cl2, FeCl3 C. 3. H*, H2O, heat 4. AICI3 heat d.arrow_forward
- TRUE OR FALSE ONLY NUMBER 1 TO 4arrow_forwardWhat is the name of the process shown below and how does it work (be specific about what happens to the molecules involved)? Which class of biomolecules (protein, lipid, carbohydrate, nucleic acid) are involved in this particular reaction example? List at least 2 types of functions this class of macromolecules might be involved in biologically. CH₂OH CH₂OH CH2OH CH₂OH НО ОН он ОН н ОН OH ОН Н + H2O → HO ОН ОН н OH + НО ОН ОН Н ОНarrow_forward1. What is the importance of heat of reaction in the laboratory? 2. Cite some factors that could possibly affect the ∆H in the experiment of heat of reaction.arrow_forward
- 27.What is latent heat of condensation? A.the amount of heat released when a certain mass of a substance changes from a gas to a liquid B.the amount of heat that is released when a certain mass of a substance changes from a liquid to a gas C.the amount of heat that is released when a certain volume of a substance changes from a liquid to a gas D.the amount of energy required to raise the temperature of a certain mass of a liquid as it changes from a liquid to a gasarrow_forward12. One way to lose weight is to exercise. Walking briskly at 4.0 miles per hour for an hour consumes about 400 kcal of energy. How many miles would you have to walk at 4.0 miles per hour to lose 1lb of body fat? One gram of body fat is equivalent to 7.7 kcal of energy. There are 454 g in 1 lb.arrow_forwardUsing the following data reactions: DH° (kJ) H2(g) + Cl2(g) ® 2HCI(g) -184 H2g) ® 2H(g) Cl2(g) ® 2CI(g) calculate the energy of an H-CI bond. O A. 855 kJ 432 239 B. 244 kJ C. 92 kJ D. 428 kJ O E. 487 kJarrow_forward
- 2arrow_forwardWhich of the following is defined as the capacity to do work and transfer heat? A.It takes more energy to break the old bonds than energy is released in forming new bonds, resulting in an exothermic reaction. B.It takes less energy to break the old bonds than energy is released in forming new bonds, resulting in an exothermic reaction. C.It takes more energy to break the old bonds than energy is released in forming new bonds, resulting in an endothermic reaction. D.It takes less energy to break the old bonds than energy is released in forming new bonds, resulting in an endothermic reaction.arrow_forwardThe vapor pressure of water at 25°C is 23.8 mm Hg. a. Find Kp for the vaporization of water using the unit of atm. b. Find Kc for the vaporization of water.arrow_forward
- ChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage LearningChemistry: An Atoms First ApproachChemistryISBN:9781305079243Author:Steven S. Zumdahl, Susan A. ZumdahlPublisher:Cengage Learning
- Chemistry for Engineering StudentsChemistryISBN:9781337398909Author:Lawrence S. Brown, Tom HolmePublisher:Cengage LearningIntroductory Chemistry: An Active Learning Approa...ChemistryISBN:9781305079250Author:Mark S. Cracolice, Ed PetersPublisher:Cengage LearningIntroductory Chemistry: A FoundationChemistryISBN:9781337399425Author:Steven S. Zumdahl, Donald J. DeCostePublisher:Cengage Learning