Q. In a closed insulated container a liquid is stirred with a paddle to increase the temperature which of the following is true : -

 5389  218 AIPMTAIPMT 2002Thermodynamics Report Error

Solution:

In closed insulated container a liquid is stirred with a paddle to increase the temperature, therefore it behaves as adiabatic process, so, for it . Hence, from first law of thermodynamics

but not equal to zero.