JAMB - Chemistry (2001 - No. 29)
NH\(_3\)\(_{(g)}\) + HCl\(_{(g)}\) → NH\(_4\)Cl\(_{(s)}\)
The entropy change in the system above is
The entropy change in the system above is
negative
indeterminate
positive
zero
Paliwanag
Deposition is a thermodynamic process that occurs when a substance changes from a gas to a solid without passing through the liquid phase. This happens due to a decrease in temperature.The entropy change for the transition from gas to solid is negative because solids have lower entropy compared to gases, gas particles are more disordered and have a higher rate of motion compared to solids that have closely packed particles.