Solid NaHC O 3 decomposes as 2 NaHC O 3 ( s ) ⇌ N a 2 C O 3 ( s ) + C O 2 ( g ) + H 2 O ( g ) . At equilibrium the total pressure of the gases is 1.2 atm. The K P for the reaction is

Question

Solid NaHC O 3 ​ decomposes as 2 NaHC O 3 ​ ( s ) ⇌ N a 2 ​ C O 3 ​ ( s ) + C O 2 ​ ( g ) + H 2 ​ O ( g ) . At equilibrium the total pressure of the gases is 1.2 atm. The K P ​ for the reaction is

TestHub · Accepted Answer

Solids are left out of K P ​ . C O 2 ​ and H 2 ​ O are formed in equal amounts, so each has a partial pressure of 0.6 atm. K P ​ = p ( C O 2 ​ ) × p ( H 2 ​ O ) = 0.6 × 0.6 = 0.36 . Answer: (A).

Chemistry - Chemical Equilibrium Question with Solution | TestHub

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