{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Ch11 - Chapter 11 Energy in Thermal Processes CHAPTER 11 1...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 11, Energy in Thermal Processes C HAPTER 11 1. A 10-kg piece of aluminum (which has a specific heat of 900 J/kg ⋅° C) is warmed so that its temperature increases by 5.0 C ° . How much heat was transferred into it? a. 4.5 × 10 4 J b. 9.0 × 10 4 J c. 1.4 × 10 5 J d. 2.0 × 10 5 J 2. In a greenhouse, electromagnetic energy in the form of visible light enters the glass panes and is absorbed and then reradiated. What happens to this reradiated electromagnetic radiation from within the greenhouse? a. 100% returns to the atmosphere. b. It’s blocked by glass. c. It’s transformed into ultraviolet upon striking the glass. d. It’s reflected as visible light upon striking the glass. 3. Which of the following best describes a substance in which the temperature remains constant while at the same time it is experiencing an inward heat flow? a. gas b. liquid c. solid d. substance undergoing a change of state 4. Carly places one end of a steel bar in a Bunsen flame and the other end in an ice cube. By what factor is the rate of heat flow changed when the bar’s cross-sectional area is doubled? 5. Dmitri places one end of a copper rod in a heat reservoir and the other end in a heat sink. By what factor is the rate of heat flow changed when the temperature difference between the reservoir and sink is tripled? 132
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Chapter 11, Energy in Thermal Processes 6. If one’s hands are being warmed by holding them to one side of a flame, the predominant form of heat transfer is what process? 7. The surfaces of a Dewar flask are silvered for the purpose of minimizing heat transfer by what process? a. conduction b. radiation c. convection d. vaporization 8. The use of fiberglass insulation in the outer walls of a building is intended to minimize heat transfer through what process? 9. A hot (70 ° C) lump of metal has a mass of 250 g and a specific heat of 0.25 cal/g ⋅° C. John drops the metal into a 500-g calorimeter containing 75 g of water at 20 ° C. The calorimeter is constructed of a material that has a specific heat of 0.10 cal/ g ⋅° C. When equilibrium is reached, what will be the final temperature? c water = 1.00 cal/g ⋅° C. a. 114 ° C b. 72 ° C c. 64 ° C d. 37 ° C
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern