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

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

  • question_answer
    One mole of a non-ideal gas undergoes a change of state (2.0 atm, 3.0 L, 95 K) \[\to \] (4.0 atm, 5.0 L, 245 K) with a change in internal energy, \[\Delta U=30.0\text{ }L\]atm. The change in enthalpy \[\Delta H\]of the process in L atm is. 

    A) 40.0

    B) 42.3

    C) 44.0

    D) Not defined because pressure is not constant

    Correct Answer: C

    Solution :

    \[\Delta H={{H}_{2}}-{{H}_{1}}=\left( {{E}_{2}}+{{P}_{2}}{{V}_{2}} \right)-\left( {{E}_{1}}+{{P}_{1}}{{V}_{1}} \right)\] \[=({{E}_{2}}-{{E}_{1}})+({{P}_{2}}{{V}_{2}}-{{P}_{1}}{{V}_{1}})\] \[=30+\left( 4\times 5-2\times 3 \right)=44L\]atm


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