chemisrty

A 50.0 mL solution of 1.2 M HCl at 24.1C is mixed with 50.0 mL of 1.3 M NaOH, also at 24.1C, in a coffee-cup calorimeter. After the reaction occurs, the temperature of the resulting mixture is 29.8C. The density of the final solution is 1.05 g/mL. Calculate the molar heat of neutralization. Assume the specific heat of the solution is 4.184 J/gC. The heat capacity of the calorimeter is 32.5 J/C

  1. 👍 0
  2. 👎 0
  3. 👁 929
asked by jesse
  1. So you reacted 1.2M x 0.050L = 0.06 mols HCl with 0.06 mols NaOH in 100 mL solution.
    mass solution = 100 mL x 1.05 g/mL = 105 grams.
    delta T = dT = 29.8-24.1 = 5.7 degrees.
    q = (mass soln x specific heat x dT) + (Ccal x dT)
    q = (105 x 4.184 x 5.7) + (32.5 x 5.7) = ? J for 0.06 mols H2O formed.
    Convert to J/1 mol and change that to kJ/mol.

    1. 👍 1
    2. 👎 0
  2. A 50.0 mL solution of 1.2 M HCl at 24.1°C is mixed with 50.0 mL of 1.3 M NaOH, also at 24.1°C, in a coffee-cup calorimeter. After the reaction occurs, the temperature of the resulting mixture is 29.8°C. The density of the final solution is 1.05 g/mL. Calculate the molar heat of neutralization. Assume the specific heat of the solution is 4.184 J/g·°C. The heat capacity of the calorimeter is 32.5 J/°C.

    1. 👍 0
    2. 👎 0
    posted by saqar
  3. 2.69kJ/mol

    1. 👍 0
    2. 👎 0
    posted by Ashleen

Respond to this Question

First Name

Your Response

Similar Questions

  1. chemistry

    . If 20.0 mL of a 0.10 M HCl solution is mixed with 10.0 mL of a 0.25 M HCl solution, what is the final concentration of HCl after the two solutions are mixed?

    asked by sarah on September 18, 2007
  2. chemistry

    Q.1 What will be the pH at the equivalence point during the titration of a 100 ml 0.2M solution of CH3COONa with 0.2M of solution of HCl?(Ka = 2*10^-5) Q.2 Aniline behaves as a weak base.When 0.1M,50ml solution of aniline was

    asked by gaurav on March 27, 2010
  3. chemistry

    If 15.0 mL of a 1.5M HCl solution at 22.5 degrees C is mixed with 25.0mL of a 1.5M NaOH solution at 21.5 degrees C that is in a calorimeter, and the final mixed solution temperature ends up at 28.5 degrees C, 1.)what is the

    asked by Alison on April 13, 2014
  4. Physical Science

    5. What reactions occurs when a solution of hydrochloric acid, HCl, is mixed with a solution of calcium hydroxide, Ca(OH)2? (A) Cl + Ca(OH) --> HCa + Cl(OH)2 (B) HCl + Ca(OH)2 --> H(OH)2 + CaCl (C) 2HCl + Ca(OH)2 --> 2H2O + CaCl2

    asked by CJ on October 16, 2013
  5. Chemistry

    50mL of 0.1M HCl is mixed with 50mL of 0.1NaOH. delta T = 3^oC. Calculate the enthalpy of neutralization per mole of HCl. assume the specific heat capcity of the solution is 4.18J/g/C and density=1.0g/mL. I tried it but got the

    asked by Vic on August 10, 2007
  1. chem

    Which of the following pairs of substances, when mixed in any proportion you wish, can be used to prepare a buffer solution? (Select all that apply.) NaCN and HCN NaCN and NaOH HCN and NaOH HCl and NaCN HCl and NaOH and Which of

    asked by Rebekah on April 12, 2011
  2. chemistry

    If 15.0 mL of a 1.5M HCl solution at 22.5 degrees C is mixed with 25.0mL of a 1.5M NaOH solution at 21.5 degrees C that is in a calorimeter, and the final mixed solution temperature ends up at 28.5 degrees C, what is the balanced

    asked by Tori on March 26, 2012
  3. science

    a solution of hcl of concentration 1.5 mole/liter is mixed with another solution of hbr of the same concentration. calculate: 1)ph of hcl solution alone 2)ph of the final mixture

    asked by Mero on December 12, 2010
  4. chemistry

    10). What is the molarity of an HCl solution if 42.5 mL of a 0.110 M KOH solution is needed to titrate a 25.0-mL sample of the acid? A) 0.187 M HCl B) 0.587 M HCl C) 0.0647 M HCl D) 5.35 M HCl E) 1.70 M HCl

    asked by denis on November 28, 2011
  5. chemistry

    A student prepares a solution of hydrochloric acid that is approximately 0.1 M and wanted to determine its precise concentration. A 25.00 mL portion of the HCl solution is transferred to a flask, and after a few drops of indicator

    asked by walter on June 14, 2015
  6. chemistry

    Solution A:50cm^3 of 1.0mol dm^-3 hydrochloric acid,HCl Solution B:10cm^3 of 2.0mol dm^-3 hydrochloric acid,HCl (a)Calculate the number of moles of hydrochloric acid,HCL in each solution. (b)Solution A and B are mixed together.

    asked by mandy on May 7, 2014

More Similar Questions