Chemistry

posted by .

DrBob222,
I don't know how to solve this problem either. And yes, this is the question for this problem. I even double check it. Please help.


Chloroform (CHCL3) has a normal boiling point of
61 'C and an enthalpy of vaporization of 29.24 kJ/mol. What is the value of delta Gvap (in kJ) at 61'C for chloroform?

Chemistry - DrBob222, Tuesday, April 30, 2013 at 3:39pm
I wonder if this is the real problem? Isn't delta G = zero at the boiling point? It would have made more sense to ask for dS vap at the normal boiling point. And how could you calculate dG anyway with no dSvap given?

  • Chemistry -

    If that is the problem I would answer dG = 0 since you have an equilibrium at the normal boiling point and dG = 0 at equilibrium.

  • Chemistry -

    dG=? . how do I start this problem?

    Do I use dG= -RT*ln*K?
    dG=-(0.008314 kj/k*mol) (61+ 273.15) ln (29.24)??

    I tried this and it is wrong.

  • Chemistry -

    There is no "starting it" if I'm right. dG = 0 since the solution at its normal boiling point is zero. There is no calculation. delta G = zero, period.

  • Chemistry -

    ok thank you!

  • Chemistry -

    Please follow up with my answer. I would like to know if I need to adjust my thinking.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Chemistry-Question 3

    A 4.86 kg sample of a solution of the solute chloroform in the solvent (C2H5)2O that has a concentration of 1.91 pph by mass chloroform is available. Calculate the amount (g) of CHCl3 that is present in the sample. Molar Mass (g/mol) …
  2. Chemistry

    Could you help me with this question: A molecule of chloroform, CHCl3, has the same shape as a molecule of methane CH4. However, methane's boiling point is -164 degrees celcius ans chloroform's boiling point is 62 degrees celcius. …
  3. Chemistry

    Question: Chloroform, CHCl3, a volatile liquid was once used an anesthetic but has ben replaced by safer compounds. chloroform has a normal boiling point at 61.7 degree C and has a heat of vaporization of 31.4 kj/mol. compute its vapor …
  4. Chemistry

    Cocaine is a non-electrolyte that has a molecular weight of 303.4 g/mole. How many grams must be dissolved in 25.0 mL of Chloroform (density = 1.484 g/mL) to raise its boiling point to 65.5 Celsius?
  5. Chemistry

    chloroform (chcl3) has a Hvap of 29.6 kj/mol and its boiling point occurs at 61.7c. the specific heat capacity of liquid chloroform is 0.622 J/gC while that of the gas is 0.714 J/gC. How much energy (in kJ) needs to be removed to condense …
  6. chemistry grade 11

    A molecule of CHCl3 (chloroform), has the same shape as a molecule of carbon tetrahydride, CH4. But carbon tetrahydride’s boiling point is -164º C and chloroform’s boiling point is 62 ºC. Explain the difference between the boiling …
  7. chemistry

    A molecule of CHCl3 (chloroform), has the same shape as a molecule of carbon tetrahydride, CH4. But carbon tetrahydride’s boiling point is -164º C and chloroform’s boiling point is 62 ºC. Explain the difference between the boiling …
  8. Chemistry

    The enthalpy of vaporization of chloroform (CHCl3) is 29.2 kJ mol-1 at its normal boiling point 61.2 Celsius. what is the standard change in entropy for vaporization of chloroform at its normal boiling point?
  9. Chemistry

    The following thermodynamic data was obtained for an unknown compound. Delta Hvap = 31.3 kj/mol and Delta S Vap= 79.7 kj/mol .Calculate the normal boiling point of this compound in Celcius.. Thank you! Chemistry - DrBob222, Tuesday, …
  10. Chemistry

    Chloroform (CHCL3) has a normal boiling point of 61 'C and an enthalpy of vaporization of 29.24 kJ/mol. What is the value of delta Gvap (in kJ) at 61'C for chloroform?

More Similar Questions