Question

Determination of enthalpy of ionization of acetic acid

Answer 1

The ionization reaction is endothermic reaction. So, during ionization of acetic acid a small amount of heat (1.2 kJ) is absorbed. As a result, the enthalpy of neutralization of acetic acid is 1.2 kJ less than that for a strong acid-strong base pair. ... This energy is called the heat of dissociation.

Answer 2

The enthalpy of ionization of acetic acid can be determined experimentally using calorimetry.

• Calorimetry is the study of heat transfer and energy changes during chemical reactions or physical processes.
• In this case, the enthalpy of ionization of acetic acid can be determined by measuring the heat transfer that occurs when a known concentration of acetic acid is ionized in a solution. The heat transfer can be measured using a calorimeter, which is an insulated container that can accurately measure small changes in temperature.
• To perform the experiment, the initial temperature of the solution in the calorimeter is recorded, and then a known volume of a strong base (such as sodium hydroxide) is added to the acetic acid solution. The temperature change that occurs during the ionization of the acetic acid is then measured and recorded.
• The enthalpy of ionization of acetic acid can then be calculated using the equation:
• ΔH = q / n
• where ΔH is the enthalpy of ionization, q is the heat transfer, and n is the number of moles of acetic acid ions produced in the reaction.
• The enthalpy of ionization of acetic acid is an important thermodynamic property that can be used to predict and understand the behavior of acetic acid in solution and to design chemical processes involving acetic acid.

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