2008_Summer_Chem2_Ex3_key

2008_Summer_Chem2_Ex3_key - Chemistry 2 Summer 2008 Exam 3...

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1 Chemistry 2 Summer 2008 Exam 3 KEY Chapters 11, 13, & 15 You might find the following useful. Answer the following by writing the word, words, letter, letters or number in each blank that best completes each sentence. (1 point each blank) 1. Something that is miscible can be mixed in any proportion without any limit to solubility. 2. A polar molecule or ion (or a portion of a molecule or polyatomic ion) that is attracted to water is called hydrophilic (“water loving”) . 3. A(n) polymer is a large molecule composed of repeating units. 4. A(n) peptide bond is an amide functional group that forms when the carboxylic acid group on one amino acid reacts with the amine group of another amino acid. 5. A(n) condensation reaction is a chemical reaction in which two substances combine to form a larger molecule with the release of a small molecule, such as water. 6. A(n) salt bridge is a link in a protein structure between a negatively charged side-chain and a positively charged side-chain. 7. Hydrogenation is a process by which hydrogen is added to an unsaturated triglyceride to convert double bonds to single bonds. This can be done by combining the unsaturated triglyceride with hydrogen gas and a platinum catalyst. 8. Hydrolysis is a chemical reaction in which larger molecules are broken down into smaller molecules by a reaction with water in which a water molecule is split in two, each part joining a different product molecule. 9. A(n) substrate is a molecule that an enzyme causes to react.
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2 10. A(n) active site is a specific section of the protein structure of an enzyme in which the substrate fits and reacts. Answer the following by writing one of these words or phrases in each blank. (1/2 point per blank) algebra glycogen necessary unit conversions Celsius hard not cholesterol increases oils close to each other insoluble point masses correct equation Kelvin precipitate directly large probability dispersed larger protein fatty acids molar mass single fats molarity smaller fructose moles of gas starches glucose units monosaccharides sugars glycerol 11. As the temperature of a gas increases, the particles’ velocity increases . 12. The particles of an ideal gas are assumed to be point masses , that is, particles that have a mass but occupy no volume. 13. Although gas temperatures are often measured with thermometers that report temperatures in Celsius scientists generally use Kelvin temperatures for calculations. 14. The observation that the pressure of an ideal gas is inversely proportional to the volume it occupies if the moles of gas and the temperature are constant is a statement of Boyle’s Law. 15. For an ideal gas, volume and temperature described in kelvins are directly proportional if the number of gas particles and pressure are constant. This is a statement of Charles’ Law.
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This note was uploaded on 03/03/2012 for the course CHEM 100 taught by Professor Mark during the Fall '06 term at Monterey Peninsula College.

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2008_Summer_Chem2_Ex3_key - Chemistry 2 Summer 2008 Exam 3...

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