Chemistry

posted by .

is the molar mass value of a volatile liquid, such as ethanol, high or small?

Usually small, but there are exceptions. The ability to be volatile means that the attractive forces between molecules in the liquid and vapor have to be small, so non polar molecules are the rule. Also, to get motion to escape the surface of the liquid, thermal energy can move smaller masses faster (KE= 1/2 mass*velocity^2). Lighter molecules can escape easier.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. AP Chemistry--gas law questions

    Hey, My AP Chem class did a lab for determing the molar mass of a volatile liquid by vapor density. There are a few calculations that I can't seem to get: 1.) The moles of air displaced by the volatile liquid vapor (at RT) 2.) The …
  2. Chemistry

    Hi! there's 3 questions..if you can help on any that'd be great..thanks! 1. Volatile liquids with lower boiling points often give better results than those with higher boiling points. Suggest a reason for this. 2. What effect would …
  3. Chemistry

    non-volatile means a liquid that won't evaporate at all. It's not a commomly encountered term because there is usually some evaporation (especially as heat is applied). The usual phrase is "very low volatility". Oil at room temperature …
  4. chemistry

    a volatile liquid was allowed to evaporate in a 43.298g flask that has a total volume of 252 mL.,the temperature of the water bath was 100 celcius at the atmospheric pressure of 776 torr.the mass of the flask and condensed vapor was …
  5. chemistry

    The molar mass of a volatile liquid(one which vaporizes easily) can be determined by a the 'Dumas Method.' In this process a small amount of the liquid (a few drops) is placed in a clean flask. The mouth of the flask is civered with …
  6. chemistry

    The molar mass of a volatile liquid(one which vaporizes easily) can be determined by a the 'Dumas Method.' In this process a small amount of the liquid (a few drops) is placed in a clean flask. The mouth of the flask is covered with …
  7. AP Chemistry

    The molar mass of a volatile liquid (one which vaporizes easily) can be determined by a the DUMAS METHOD.' In this process a small amount of the liquid (a few drops) is placed in a clean flask. The mouth of the flask is covered with …
  8. CAP hemistry

    When determining the molar mass of a volatile liquid by heating the liquid and then using the condensed, volatile vapor's mass, why do volatile liquids with lower boiling points give better results?
  9. chemistry lab

    When determining the molar mass of a volatile liquid by heating the liquid and then using the condensed, volatile vapor's mass, why do volatile liquids with lower boiling points give better results?
  10. Chemistry

    After the volatile liquid has been added to the Erlenmeyer flask, the total pressure in the flask equals the vapor pressure of the volatile liquid. True or False?

More Similar Questions