2. Questions Bank
  3. JEE Main & Advanced
  4. Chemistry
  5. Thermodynamics / रासायनिक उष्मागतिकी

JEE Main & Advanced Chemistry Thermodynamics / रासायनिक उष्मागतिकी Question Bank Mock Test - Chemical Thermodynamics

  • question_answer
    A vessel contains 100 litres of a liquid X. Heat is supplied to the liquid in such a fashion that heat given = change in enthalpy. The volume of the liquid increases by.2 litres. If the external pressure is 1 ami and 202.6 joules of heat were supplied, then [U= total internal energy]

    A)  \[\Delta U=0,\,\Delta H=0\]

    B)  \[\Delta U=+202.6J,\,\Delta H=+202.6J\]

    C)  \[\Delta U=-202.6J,\,\Delta H=-202.6J\]

    D)  \[\Delta U=0,\,\Delta H=+202.6J\]

    Correct Answer: D

    Solution :

    [d] \[\Delta H=\]heat given so process is isobaric. \[w=-{{P}_{ext}}(\Delta V)=-1\times 2\].liter. atm \[=-202.6J\] Hence, \[q=202.6J=\Delta H\]and \[\Delta E=q+w=0\]


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