Is Heat Flowing Into or Out of the System?

AI Thread Summary
The internal energy of the system increases by 200 J while 900 J of work is done on it, resulting in a heat flow of 700 J. This indicates that heat is flowing into the system, as the work done on the system adds energy. The confusion arises from interpreting the direction of heat flow in relation to the work performed. To clarify, when work is done on a system and internal energy increases, heat must be absorbed by the system. Therefore, the heat flow is into the system.
Mr. Goosemahn
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Homework Statement



The internal energy of a system increases by 200 J while 900 J of work are performed on it. What was the magnitude of the heat flow into or out of the system?

Does the heat flow "out of" or "into" the system?

Homework Equations


Don't really need.


The Attempt at a Solution


I found the magnitued already, being 700 Joules, but I'm not entirely sure about the second question.

I think it's "out of," but don't really know. How do I evaluate this aspect of the question?
 
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