Question

In a laboratory, liquid in a thermally insulated container is stirred for one hour by a mechanical linkage to a stirrer, for this process:

• A. $W<0;q=0$
• B. $W<0;q>0$
• C. $W>0;q>0$
• D. $W>0;q=0$

Answer 1

The correct option is D $W>0;q=0$

As the system is thermally insulated, it means there is no exchange of heat.

So, $q=0$ and work is done on the system by stirring.

Hence $W>0$

$W>0,q=0$

So, the correct option is $D$.