Question

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

• A. \( \Delta E = W = Q = 0 \)
• B. \( \Delta E \neq 0, Q = W = 0 \)
• C. \( \Delta E = W \neq 0, Q = 0 \)
• D. \( \Delta E \neq 0, Q \neq 0, W = 0 \)

Hint:

In thermodynamic processes with no work done, the heat added causes a change in internal energy.

Answer 1

The Correct Option is D

In a closed container, as the liquid is stirred, energy is added to the system, leading to a change in internal energy \( \Delta E \). Work is zero because the container is insulated, and heat is transferred into the liquid, so \( Q \neq 0 \).
Final Answer: \[ \boxed{\Delta E \neq 0, Q \neq 0, W = 0} \]