Respuesta :
Answer:
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
The enthalpy of solution for calcium chloride is 82.74 kJ/mol.The specific heat capacity is the heat or energy required to change one unit mass of a substance
Given:
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
Specific heat:
∴ Heat released on dissolution = Mass * Specific heat * ΔTemperature
Heat released = 103 g x 4.184 J/g °C x 5.19 °C
Heat released = 2236.64 J
Molar mass of CaCl₂ = 110.98 g/mol
∴ Heat released on dissolution of a mol of CaCl₂
Heat released= (2236.64 J / 3.0 g) x 110.98 g/mol
Heat released= 82740.769 J/mol
The heat released in KiloJoules = 82.74 kJ/mol
Find more information about specific heat here:
brainly.com/question/13439286