Heat of Solution
Chemistry ⇒ Thermochemistry and Energetics
Heat of Solution starts at 11 and continues till grade 12.
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See sample questions for grade 12
A student dissolves 5 g of NH₄NO₃ in 50 g of water and observes a temperature drop. What type of process is this?
Describe how you would experimentally determine the heat of solution of a salt.
Describe the steps involved in the dissolution of an ionic compound in water in terms of energy changes.
Explain the difference between heat of solution and heat of hydration.
A student dissolves 5 g of NH₄NO₃ in 50 g of water and observes a temperature drop. What type of process is this?
Calculate the heat of solution if 10 g of a salt (molar mass = 50 g/mol) is dissolved in water and the temperature of 100 g of water increases by 2°C. (Specific heat capacity of water = 4.18 J/g°C)
If the heat of solution for a salt is negative, what will happen to the temperature of the solution upon dissolution?
The heat of solution for KCl is +17.2 kJ/mol. What will happen to the temperature of the solution when KCl is dissolved in water?
The dissolution of which of the following salts is most likely to be used in a cold pack? (1) NaCl (2) CaCl₂ (3) NH₄NO₃ (4) NaOH
Which of the following best defines the heat of solution? (1) The heat absorbed or released when one mole of a solute dissolves in a solvent to form an infinitely dilute solution (2) The heat required to raise the temperature of a solution by 1°C (3) The heat released when a solute crystallizes from a solution (4) The heat absorbed when a solvent evaporates
Which of the following factors does NOT affect the heat of solution? (1) Temperature (2) Pressure (3) Nature of solute and solvent (4) Color of the solute
Which of the following is a practical application of endothermic heat of solution? (1) Hot packs (2) Cold packs (3) Cooking (4) Electrolysis
Fill in the blank: The dissolution of CaCl₂ in water is ________ because the heat of hydration is much greater than the lattice energy.
If the dissolution of a salt in water is accompanied by a decrease in temperature, the process is ________.
If the heat of hydration is greater than the lattice energy, the heat of solution will be ________.
The enthalpy change when one mole of gaseous ions is dissolved in water to form hydrated ions is called ________.
State whether the following statement is true or false: The heat of solution for NaOH is negative.
State whether the following statement is true or false: The heat of solution is always measured per mole of solute.
True or False: The dissolution of ammonium nitrate in water is an exothermic process.
True or False: The heat of solution can be either endothermic or exothermic depending on the solute and solvent.
