PPT Slide

• Consider a system that does no  work but transfers energy only as  heat (q); w = 0, so _E = q.

4

• Internal energy decreases as heat  flows out of the system, so  _E < 0 so q < 0

• Ice water will gain energy as heat  from the surroundings until its  temperature and that of the  surroundings are equal.

_E > 0 so q > 0

Concept 6-2 How energy is transferred to or from a system as

heat and/or work

Previous slide

Next slide

Back to first slide

View graphic version