Wow..I\'m lost :( Explanation would be wonderful... A container holds 2.9 kg of

Question

Wow..I'm lost :( Explanation would be wonderful...

A container holds 2.9 kg of water that is initially at 332 K and is converted to steam at 401 K. Assuming the volume of the system does not change, what is the change in the internal energy of the system?

Which of the following statements are true for this problem? (Select all that apply.)
1. The change in internal energy is equal to the heat minus the work on the system.
2. The change in internal energy is equal to the heat transferred to the system.
3. If the volume doesn't change, no work is done.
4. A finite amount of work is done.

Explanation / Answer

According to first law of thermodynamics , dQ = dU + dW ------------- (1) and dW = pdV ----------- (2) if the volume is constant , dW = 0. Hence equation (1) we con written as dQ = dU . The following statements are true for this problem: 2. The change in internal energy is equal to the heat transferred to the system. 3. If the volume doesn't change, no work is done.

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