RAJASTHAN ­ PET Rajasthan PET Solved Paper-2008

  • question_answer
    A balloon is filled at\[27{}^\circ C\]and 1 atm pressure by 500 m3 He. At\[~-3{}^\circ C\]and 0.5 atm pressure, the volume of He will be

    A)  \[700\text{ }{{m}^{3}}\]          

    B)  \[900\text{ }{{m}^{3}}\]

    C)  \[1000\text{ }{{m}^{3}}\]         

    D)  \[500\text{ }{{m}^{3}}\]

    Correct Answer: B

    Solution :

     \[\frac{{{p}_{1}}{{V}_{1}}}{{{T}_{1}}}=\frac{{{p}_{2}}{{V}_{2}}}{{{T}_{2}}}\] Or \[{{V}_{2}}=\frac{{{p}_{1}}{{V}_{1}}{{T}_{2}}}{{{p}_{2}}{{T}_{1}}}\] \[\therefore \] \[{{V}_{2}}=\frac{1\times 500\times (273-3)}{0.5\times (273+27)}\] \[{{V}_{2}}=\frac{1\times 500\times 270}{0.5\times 300}\] \[{{V}_{2}}=900\text{ }{{m}^{3}}\]


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