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A flask of 1L having NH(3)(g) at 2.0atm ...

A flask of 1L having `NH_(3)(g)` at 2.0atm and 200K is connected with another flask of vol 800ml having HCl(g) at 8atm & 200K through tube of negligible volume. The two gases reacts to form `NH_(4)Cl(s)` with evolution of 43 KJ/mol heat. If heat capacity of at constant volume is 20J/K/mol and neglecting heat capacity of flask and solid, volume of solid formed and its pressure (R = 0.08).
The final pressure in the flask is

A

14.39atm

B

1.49atm

C

16.39atm

D

15.39atm

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