Answer:
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Explanation:
V-pneumonoultramicroscopicsilicovolcanoconiosis
Hello Mate!Well, there are
many definitions and descriptions of isolated systems, and
here are some of them:
1.
It can be a physical system which is located very very far from all other systems, so there is absolutely no interaction between them, thus making it isolated.
2.
It can be a thermodynamic system with rigid walls, which prevents mass and energy to pass through.
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<u>Answer:</u> The internal energy change for the reaction is -2850 J
<u>Explanation:</u>
- <u>Sign convention of heat:</u>
When heat is absorbed, the sign of heat is taken to be positive and when heat is released, the sign of heat is taken to be negative.
- <u>Sign convention of work:</u>
Work done for expansion process is taken as negative and work done for compression is taken as positive.
According to the First law of thermodynamics,
![\Delta U=q+w](https://tex.z-dn.net/?f=%5CDelta%20U%3Dq%2Bw)
where,
= internal energy
q = heat absorbed or released = -2290 J
w = work done = -560 J
Putting values in above equation, we get:
![\Delta U=(-2290)+(-560)\\\\\Delta U=-2850J](https://tex.z-dn.net/?f=%5CDelta%20U%3D%28-2290%29%2B%28-560%29%5C%5C%5C%5C%5CDelta%20U%3D-2850J)
Hence, the internal energy change for the reaction is -2850 J
The correct answer is the degree of exactness in a measurement