s Solved papers for NEET Physics Thermodynamical Processes NEET PYQ-Thermodynamical Processes - Studyadda.com
  2. Solved Papers
  3. NEET
  4. Physics
  5. Thermodynamical Processes

NEET Physics Thermodynamical Processes NEET PYQ-Thermodynamical Processes

  • question_answer
    A monoatomic gas at a pressure p, having a volume V expands isothermally to a volume 2 V and then adiabatically to a volume 16 V. The final pressure of the gas is (take \[\gamma =\frac{5}{3}\])                        [NEET 2014]

    A)  64 p    

    B)       32 p

    C)  \[\frac{p}{64}\]            

    D)       16 p

    Correct Answer: C

    Solution :

    For isothermal expansion
    \[pV=p'\times 2V\]          \[[\therefore V'=2V]\]
    \[p'=\frac{p}{2}\]
    For adiabatic expansion,
    \[p{{V}^{\gamma }}=\] constant
    \[p'{{V}^{'\gamma }}=p''V'{{'}^{\gamma }}\]
    \[\frac{p}{2}{{[2V]}^{5/3}}=p''{{[16V]}^{5/3}}\]
    \[p''=\frac{p}{2}{{\left[ \frac{2V}{16V} \right]}^{5/3}}=\frac{p}{2}{{\left[ \frac{1}{8} \right]}^{5/3}}\]
                \[=\frac{p}{2}[0.03125]\]
                \[=0.0156p\]
                \[=p/64\]


You need to login to perform this action.
You will be redirected in 3 sec spinner