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Question

A container id divided into two compartment. One compartment contains 2 mole of N2 gas at 1 atm and 300 K & other compartment contains H2 gas at the same temperature and pressure. Volume of H2 compartment is four times the volume of N2 compartment. [assume no reaction under these condition]
If the container containing N2 and H2 are further heated to 1000 K forming NH3 with 100% yield. Calculate the final total pressure.

A
2.22 atm
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B
3 atm
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C
2 atm
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D
3.33 atm
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Solution

The correct option is B 3.33 atm
Compartment containing N2
n=2
P=1atm
T=300K
Finding for V
Using Ideal gas equation
PV=nRT
V=2×0.0821×3001=49.26L
Compartment containing H2
Givn volume is 4 times than N2
V2=4×49.26=197L
Finding moles for H2 Compartment
given pressure and temperature is equal to N2 compartment
n=1970.0821×300=8
Calculating final pressure
T=1000K
P=8×0.0821×1000197=3.33atm

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