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Warming ammonium chloride with sodium hy...

Warming ammonium chloride with sodium hydroxide in a test tube is an example of :

A

Open system

B

Closed system

C

Isobaric system

D

Isothermal system

Text Solution

Verified by Experts

The correct Answer is:
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 places with the surroundings
`NH_4 Cl (s) hArr NH_3 (g) + HCl (g)`
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