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  • A vessel  contains 4 g of dioxygen gas at STP . The gas is Now transferred to another vessel at constant temperature, where pressure become one fourth of the original pressure.

A vessel  contains 4 g of dioxygen gas at STP . The gas is Now transferred to another vessel at constant temperature, where pressure become one fourth of the original pressure.
The at volume of New vessel  in L is:-
[Given - Molar volume at STP is 22.4L]

Option: 1

11.2


Option: 2

10.2


Option: 3

12.2


Option: 4

13.2


Answers (1)

best_answer

no. of moles of 

O_2=\frac{\text { Given weight of } O_2}{\text { Mol weight of } O_2}=\frac{4}{32}=.125

molar volume at 

\begin{aligned} & \quad S T P=.125 \times 22.4=2.8 \mathrm{~L} \\ & P_1=1 \mathrm{atm} \\ & v_1=2.8 \mathrm{~L}, \quad P_2=\frac{1}{4} \quad v_2=? \end{aligned}

\text { According to Boyle's Law } P_1 v_1=P_2 v_2

\begin{aligned} \therefore 1 \times 2.8 & =\frac{1}{4} \times v_2 \\ v_2 & =2.8 \times 4 \\ & =11.2 \mathrm{~L} \end{aligned}

Posted by

manish painkra

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