When NH 4CI was dissolved in water, the container was cold to touch. This implies that

Assessment: WAEC SSCE - Chemistry - 2011 (Objective) Subject: Chemistry

Question 1 Report

When NH 4CI was dissolved in water, the container was cold to touch. This implies that
Answer Details
When NH4CI is dissolved in water, it undergoes an endothermic process. This is because the dissolution of NH4CI in water requires energy in the form of heat to break the bonds between the NH4CI molecules and allow the NH4CI to mix with the water. This energy is absorbed from the surrounding environment, resulting in a decrease in temperature and the container feeling cold to the touch. Therefore, the correct option is "the process is endothermic".

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