Chemistry

Which of the following is NOT true about the thermodynamic standard state?


A. A solid is in its standard state when the atmospheric pressure is 1.00 atm and the temperature is 25C.
B. A pure liquid is in its standard state at 25C and a vapor pressure of 1.00 atm.
C. An aqueous solution is in its standard state at a concentration of 1.00 M.
D. A gas is in its standard state when its pressure is 1.00 atm and its temperature is 25C.
E. All of these are true.

I am left between B and C. For B i couldn't find the VP of water to be 1.00atm. I don't know anything about C.

  1. 👍 0
  2. 👎 0
  3. 👁 116
asked by Tom
  1. C is correct. 1 M concn is the standard state for solutions. B is not true. A pure liquid need NOT have a vapor pressure of 1 atm. If it's a pure liquid, then it has its normal vapor pressure at 25 degrees C.

    Some notes here, which probably were not meant to apply to this problem but may be worth mentioning, anyway, are as follows:
    The concn of 1.00 molar ACTUALLY is an ACTIVITY of 1.00.
    I understand that the IUPAC changed the standard pressure from 1 atmosphere to 1 bar (exactly 100 kPa) in 1990. As far as I know, most everyone in the US still uses 1 atm. That sorta like the STP and SATP. SATP haven't caught on in the US yet, at least not widely.
    Under those added rules, there are several statements above not true; however, I think the question was meant to be more elementary than that.

    1. 👍 0
    2. 👎 0
  2. If nitrogen gas is 0.10 atm, hydrogen gas is 0.50 atm, and oxygen gas is 1.00 atm. What is the partial pressure of the three gases?

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. Chemistry

    Which of the following is NOT true about the thermodynamic standard state? A. A pure liquid is in its standard state at 25C and a vapor pressure of 1.00 atm. B. A gas is in its standard state when its pressure is 1.00 atm and its

    asked by Jared on May 7, 2007
  2. chem

    Which of the following is NOT true about the thermodynamic standard state? A. A gas is in its standard state when its pressure is 1.00 atm and its temperature is 25C. B. An aqueous solution is in its standard state at a

    asked by Anonymous on February 24, 2008
  3. chemistry

    Which of the following is NOT true about the thermodynamic standard state? A. A gas is in its standard state when its pressure is 1.00 atm and its temperature is 25C . B. An aqueous solution is in its standard state at a

    asked by jina on February 20, 2008
  4. chemistry

    Which of the following is NOT true about the thermodynamic standard state? A. A pure liquid is in its standard state at 25C and a vapor pressure of 1.00 atm. B. An aqueous solution is in its standard state at a concentration of

    asked by jeff on May 17, 2009
  5. Chemsitry

    Which of the following is NOT true about the thermodynamic standard state? A. A solid is in its standard state when the atmospheric pressure is 1.00 atm and the temperature is 25C. B. An aqueous solution is in its standard state

    asked by Anonymous on February 25, 2008
  6. Chemistry

    which method increase the surface of a solid, allowing it to dissolve faster? A)changing the state of the solid B)adding has to the solid C)heading the solid D)reducing the size of the solid

    asked by AHS on January 10, 2011
  7. chemistry

    A method for scrubbing CO2(g) from the air on a spacecraft is to allow CO2(g) to react with NaOH according to the following (unbalanced reaction). NaOH(s) + CO2(g) → Na2CO3(s) + H2O(l) Use the appropriate thermodynamic tables to

    asked by Boris on February 3, 2015
  8. world geography

    the state of Alaska does not change their clocks when the country goes to standard time? true or false ,my answer is true right

    asked by M on August 20, 2008
  9. chemistry

    calculate the standard molar entropy change for the combustion of methane gas using S naught values from standard thermodynamic tables. Assume that liquid water is one of the products.

    asked by Bru on October 5, 2012
  10. Chemistry

    Which method increases the surface of a solid, allowing it to dissolve faster? A)changing the state of the solid B)adding gas to the solid C)heating the solid D)reducing the size of the solid ****Please help!!!!******* I think the

    asked by AHS on January 11, 2011

More Similar Questions