MSE350-exam1-5oct07b-all - Name ID Number MSE 350 Exam I(b...

Info icon This preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Name:_________________________ ID Number:___________________ 1 MSE 350 Exam I – 10/05/07(b) You may use a page of notes, a periodic table, & a calculator for this exam Good Luck! This exam is taking place under the College of Engineering Honor Code. In order to obtain credit for this exam, you are required to write the Honor Pledge and your signature below: Honor Pledge: _____ Signature: Page 2 /20 Page 3 /16 Page 4 /12 Page 5 /12 Page 6 /20 Page 7 /20 TOTAL /100 h=6.6261x 10 -34 J-s m e =9.11 x 10 -31 kg
Image of page 1

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

View Full Document Right Arrow Icon
Name:_________________________ ID Number:___________________ 2 True/False: Answer the following questions T rue or F alse (2 points each): 1._____ The cohesive energy is the energy which enables a liquid to freeze. 2._____ A BCC lattice has a lower packing fraction than an FCC lattice 3._____ The kinetic energy associated with a delocalized electron helps hold together a metallic solid. 4._____ The cohesive energy of a pair of ions is usually larger than the the cohesive energy of a 3D ionic solid containing the same atoms. 5._____ A face-centered cubic (FCC) lattice has ABC stacking of its closest-packed planes, while a hexagonal close-packed (HCP) lattice has AB stacking of its closest-packed planes. Fill in the Blanks: 6. Fill in the blanks in the following calculation of the cohesive energy of an ionic solid (1 point each, 8 points total) [Note: #s are not needed here]: 7. Considering your answer in #6, write out an expression for the Cohesive Energy, U cohesive , of an ionic solid (2 points): Be Gas + Be + Gas + + + O - Gas O Gas Be +2 + Gas Cl - Gas O -2 Solid O -2 + + + Be Gas + O Gas Solid + + O -2 Be +2 Be +2 Gas + Be +2 Gas + Be + + + O -2 Gas Gas O - + +
Image of page 2
Name:_________________________ ID Number:___________________ 3 Short Answer: 8. Define the Cohesive Energy of a Solid (3 points): 9. Considering the terms in the cohesive energy for ionic, covalent, and metallic bonding, explain why Group IVB elements and Group A transition elements tend to have a significant component of covalent bonding. [Hint: Compare the values of the energy terms on your periodic table] (3 points): 10. A few years ago, Prof. Hales, from the Mathematics Department here at the University of Michigan, found the answer to a problem which mathematicians have been struggling to solve for nearly 400 years. The
Image of page 3

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

View Full Document Right Arrow Icon
Image of page 4
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