2. Questions Bank
  3. NEET
  4. Chemistry
  5. Thermodynamics / रासायनिक उष्मागतिकी

NEET Chemistry Thermodynamics / रासायनिक उष्मागतिकी Question Bank Self Evaluation Test - Thermodynamics

  • question_answer
    0.5 mole each of two ideal gases \[A\left( {{C}_{v,m}}=\frac{5}{2}R \right)\]and \[B({{C}_{v,m}}=3R)\] are taken in a container and expanded reversibly and adiabatically, during this process temperature of gaseous mixture decreased from 350 K to 250 K. Find \[\Delta H\] (in cal/mol) for the process:

    A) \[-100R\]                       

    B) \[-137.5\text{ }R\]

    C) \[-375R\]                       

    D) None of these 

    Correct Answer: C

    Solution :

    [c] \[\Delta H=({{n}_{1}}{{C}_{p,{{m}_{1}}}}+{{n}_{2}}{{C}_{p,{{m}_{2}}}})\Delta T\] \[=\left( 0.5\times \frac{7}{2}R+0.5\times 4R \right)(-100)\] \[=-375\text{ }R\]


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