Question

when ammonium chloride is dissolved in water, the beaker gets cold. which type of reaction does this describe?
○ exothermic
○ endothermic
○ both exothermic and endothermic
○ neither exothermic nor endothermic

Explanation:

To determine the reaction type, we analyze the energy change:

• Exothermic reactions release heat (surroundings get warm).
• Endothermic reactions absorb heat (surroundings get cold).

When ammonium chloride dissolves in water, the beaker gets cold, meaning the system (dissolving process) absorbs heat from the surroundings (the beaker/water). This matches the definition of an endothermic process.

Answer:

B. endothermic