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 11
A student observes that the temperature of a solution increases when a salt is dissolved. What can be inferred about the sign of the heat of solution?
Define the term 'enthalpy of hydration'.
Describe how you would experimentally determine the heat of solution of a salt.
Describe the difference between heat of solution and heat of hydration.
A solution is prepared by dissolving 20 g of KCl (ΔH_solution = +17 kJ/mol, molar mass = 74.5 g/mol) in water. Calculate the heat absorbed.
A student dissolves 5 g of NH₄Cl (ΔH_solution = +15 kJ/mol, molar mass = 53.5 g/mol) in water. Calculate the heat change.
A student observes that the temperature of a solution increases when a salt is dissolved. What can be inferred about the sign of the heat of solution?
Calculate the heat absorbed when 10 g of KNO₃ (molar mass = 101 g/mol, ΔH_solution = +34 kJ/mol) is dissolved in water.
The heat of solution is also known as: (1) Enthalpy of dissolution (2) Enthalpy of formation (3) Enthalpy of combustion (4) Enthalpy of vaporization
Which of the following best describes the heat of solution for most salts? (1) Always positive (2) Always negative (3) Can be positive or negative (4) Always zero
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 solute
Which of the following is NOT a step in the dissolution process? (1) Breaking solute-solute interactions (2) Breaking solvent-solvent interactions (3) Formation of solute-solvent interactions (4) Formation of new elements
Fill in the blank: If the dissolution of a salt in water releases heat, the process is said to be __________.
Fill in the blank: The heat of solution is an example of an __________ property.
Fill in the blank: The heat of solution is measured under conditions of constant __________.
Fill in the blank: The heat of solution is the sum of the lattice energy and the __________ energy.
State whether the following statement is true or false: The heat of solution for NaCl is slightly endothermic.
State whether the following statement is true or false: The heat of solution is always measured at standard temperature and pressure.
True or False: The heat of solution can be determined using a coffee-cup calorimeter.
True or False: The heat of solution can be either positive or negative.
