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 250 g of gaseous chloroform from 75.0C to a liquid at 40.0C? Molar mass of chloroform is 119.37 g/mol.

  1. 0
  2. 7
asked by sjhfds
  1. I'm not going to go through this this will all of the temps but you can. Here is how you do the problem.
    q1 = heat removed to move chloroform vapor from starting T to boiling point.
    q1 = mass CHCl3 x specific heat vapor x (Tfinal-Tinitial)

    q2 = heat removed to condense vapor at boiling point to liquid at boiling point.
    q2 = mass x heat vap.

    q3 = heat removed to move T from boiling point to final T in liquid phase.
    q3 = mass CHCl3 x specific heat liquid CHCl3 x (Tfinal-Tinitial)

    Total q = q1 + q2 + q3.
    Note: Everything is in J/g except for dHvap. I would change that to J/g first thing out of the box.

    1. 0
    posted by DrBob222

Respond to this Question

First Name

Your Response

Similar Questions

  1. 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
  2. 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?
  3. 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? Answer I got was
  4. Chemistry

    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
  5. 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
  6. 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
  7. 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
  8. chem 11

    Chloroform, CHCl3, has a boiling point of 62 oC, whereas methane, CH4, has a much lower boiling point of -164 oC. Using diagrams, explain the difference between the two boiling points.
  9. 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.
  10. Chem Help Please Urgent!!!!!!

    What is the boiling point of a solution of 0.515 grams of acenaphthene (C12H10) in 15 grams chloroform (CHCl3) given pure chloroform has a b.p. of 61.7 C and a Kbp of +3.63 C. Thanks!

More Similar Questions