M g C O 3 ( s ) ⇌ M g O ( s ) + C O 2 ( g ) has K p = 0.02 atm at a given temperature. What per cent of C O 2 (by volume) in an atmosphere at a total pressure of 2 atm is just sufficient to pr

Question

M g C O 3 ​ ( s ) ⇌ M g O ( s ) + C O 2 ​ ( g ) has K p ​ = 0.02 atm at a given temperature. What per cent of C O 2 ​ (by volume) in an atmosphere at a total pressure of 2 atm is just sufficient to prevent loss in weight of M g C O 3 ​ when it is heated at this temperature?

TestHub · Accepted Answer

K p ​ = p ( C O 2 ​ ) = 0.02 atm . Mole fraction = 0.02/2 = 0.01 , i.e. 1 %. Trap: 2 % comes from forgetting the total pressure is 2 atm. Answer: (A).

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