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NTA Abhyas 2020
Exam
NTA Abhyas
Year
2020
Subject
Chemistry
Chapter
States of Matter

NTA Abhyas 2020 · Chemistry · States of Matter

One mole of N _ 2 O _ 4 (g) at 300 K is kept in a closed container...

One mole of N2O4{N}_{2}{O}_{4} (g) at 300 K is kept in a closed container under one atmosphere. It is heated to 600 K when 20% by mass of N2O4{N}_{2}{O}_{4} (g) decomposes to NO2\text{N}{\text{O}}_{2} (g). The resultant pressure (in atm) is

Correct answer

2.4

Step-by-step solution

N2O411−0.2↔2NO200.4\mathop{{N}_{2}{O}_{4}}_{\mathop{1}_{1 - 0.2}} ↔ \mathop{\text{2N}{\text{O}}_{2}}_{\mathop{0}_{0.4}}

=0.8= 0.8

Number of moles at 300 K = 1

No. of moles at 600 K = 0.8 + 0.4 = 1.2

V is constant

P2P1=n2T2n1T1\dfrac{{P}_{2}}{{P}_{1}} = \dfrac{{n}_{2}{T}_{2}}{{n}_{1}{T}_{1}}

P21=1.2×6001×300=2.4atm\dfrac{{P}_{2}}{1} = \dfrac{1.2 \times 600}{1 \times 300} = 2.4atm
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