Ask Question
10 July, 06:06

What is the change in temperature when 3.00 grams of calcium chloride is dissolved in 100 mL of water?

5.19

oC

Given the change in the temperature from adding 3.00 grams of calcium chloride to 100.00 mL of water (5.19), calculate the enthalpy of solution for calcium chloride in units of kJ/mol.

kJ/mol

+3
Answers (1)
  1. 10 July, 09:19
    0
    82.74 kJ/mol

    Explanation:

    Mass of Water = 100 mL = = 100 g

    Mass of CaCl₂ = 3 g

    Total solution mass = H₂O mass + CaCl₂ mass = 103 g

    Heat capacity is same as that of water 4.184 J/g °C

    ∴ Heat released on dissolution = Mass x Specific heat x ΔTemperature

    = 103 g x 4.184 J/g °C x 5.19 °C

    = 2236.64 J

    Molar mass of CaCl₂ = 110.98 g/mol

    ∴ Heat released on dissolution of a mol of CaCl₂

    = (2236.64 J / 3.0 g) x 110.98 g/mol

    = 82740.769 J/mol

    In KiloJoules = 82.74 kJ/mol
Know the Answer?
Not Sure About the Answer?
Find an answer to your question ✅ “What is the change in temperature when 3.00 grams of calcium chloride is dissolved in 100 mL of water? 5.19 oC Given the change in the ...” in 📘 Chemistry if you're in doubt about the correctness of the answers or there's no answer, then try to use the smart search and find answers to the similar questions.
Search for Other Answers