In a closed insulated container, a liquid is stirred with a paddle to increase the temperature, which of the following is true?

Options

A. `DeltaE=W!=0,q=0`
B. `DeltaE=W=q!=0`
C. `DeltaE=0,W=q!=0`
D. `W=0,DeltaE=q!=0`

Answer

A

Explanation

Internal energy is dependent upon temperature and according to first law of thermodynamics total energy of an isolated system remains same i.e. in a system of constnat mass, energy can neither be created nor destroyed by an physcal or chemical change but can be transformed from one form to another
`DeltaE=q+W`
For closed insulated container `q=0` so `DeltaE=+W` as work is done by the system.