For heat, q:
▪ +q → if the system gains, takes in, or absorbs heat or energy
▪ –q → if the system loses, evolves, gives off, or releases heat or energy
For work, w:
▪ +w → work is done on the system by the surroundings (volume: compresses)
▪ –w → work is done by the system on the surroundings (volume: expands)
(assuming the physical change is from gas to solid)
• heat is removed going from gas to liquid
The scene below represents a physical change taking place in a piston-cylinder assembly:
Can you determine whether ΔEsurr is +, −, or 0? Explain.
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Our tutors have indicated that to solve this problem you will need to apply the Internal Energy concept. You can view video lessons to learn Internal Energy. Or if you need more Internal Energy practice, you can also practice Internal Energy practice problems.
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What textbook is this problem found in?
Our data indicates that this problem or a close variation was asked in Chemistry: The Molecular Nature of Matter and Change - Silberberg 8th Edition. You can also practice Chemistry: The Molecular Nature of Matter and Change - Silberberg 8th Edition practice problems.