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Chapter 12 problems

Chapter 12 problems. What type of forces, intermolecular or intramolecular … A) prevent ice cubes from adopting the shape of the container? B) are overcome when the ice melts? C) are overcome when liquid water vaporizes? D) are overcome when gaseous water is converted to hydrogen and oxygen?.

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Chapter 12 problems

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  1. Chapter 12 problems

  2. What type of forces, intermolecular or intramolecular… • A) prevent ice cubes from adopting the shape of the container? • B) are overcome when the ice melts? • C) are overcome when liquid water vaporizes? • D) are overcome when gaseous water is converted to hydrogen and oxygen?

  3. When nitrogen gas is compressed to form liquid nitrogen, it cools to a very low temperature (around -200oC). Molecularly speaking, the nitrogen gas molecules released a lot of energy (as heat). Where did this energy come from?

  4. Which one will have a higher vapor pressure:a) ethanol or ethane? b) 10mL H2O in a 3-cm diameter vial or 10mL H2O in a 10-cm diameter culture plate?

  5. At which condition will a wet rag dry faster? a) 20oC or 40oC b) 33% humidity or 10% humidity

  6. Which one will have a higher melting point? • cis-fat vs trans-fat • CCl4vsNaCl

  7. The exceptionally high heat capacity of water is due to the number of H-bonding a single water molecule have. How many can it have? Show them.

  8. Calculate the total heat needed to convert 22.00 g of ice at -6.00oC to liquid water at 0.500oC. • Given data: ΔHfus = 6.02 kJ/mol • Cice= 2.09 J/g-oC

  9. If a liquid has a ΔHvap of 35.5 kJ/mol, and a boiling point of 122oC, what is its vapor pressure at 113oC?

  10. · E Consider the phase diagram… · F · C · D · B · A

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