A sample of liquid in a thermally insulated container (a calorimeter) is stirred for 2 hr . by a mec

Question

A sample of liquid in a thermally insulated container (a calorimeter) is stirred for 2 hr . by a mechanical linkage to a motor in the surrounding. For this process :

Professor PC Thomas Classes · Answer

(d)\ $ \begin{aligned} & q=0, \quad \Delta U=q+w \ & w>0 \quad 	ext { so } \Delta U>0 \end{aligned} $