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Warming Ammonium chloride with sodium hydrochloride in a test tube is an example of
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- Open system
- Closed system
- Isobaric system
- Isothermal system
- Open system
Correct Option: A
When heated, ammonium chloride decomposes into ammonia and hydrogen chloride. The thermal decomposition of ammonium chloride is a reversible chemical change. On heating above 340°C, it decomposes to form two gases such as ammonia and hydrogen chloride. On cooling, the reaction is reversed and solid ammonium chloride is formed. The reaction is an example of an open system in which exchange of mass and energy takes place with the surroundings.
NH4Cl(s) NH3(g)+HCl(g)
