Question

a system absorb 640 h heat and does work of 260 j the change in internal energy of the system will be?​

Answer 1

Answer:

The system absorbs 640 J and the work system does on surroundings is 260J. Therefore by the first law of thermodynamics, the internal energy of the system increases by: △U=q−W=(640−260)=+380 J.

Answer 2

Answer:

A system absorbs 640 h heat and does work of 260 j the change in internal energy of the system will be + 380 J.

Explanation:

By using the first law of thermodynamics:

This indicates that heat energy cannot be made or destroyed. It can, however, be transmitted from one place to another and transformed to and from other conditions of the energy.

The system absorbs 640 J and the work system does on surroundings exists 260J.

Therefore by the first law of thermodynamics, the internal energy of the system increases by:

△U = q − W

= (640 − 260) = + 380 J.

Therefore, the correct answer is + 380 J.

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