Recall: When the system does work on the surroundings, the sign for work (w) is negative (w < 0). On the other hand, work is positive (w > 0) if the surroundings do work on the system. To illustrate
At constant pressure, which of these systems do work on the surroundings?
A. 2A(g) + 3B(g) → 4C(g)
B. A(s) + B(s) → C(g)
C. 2A(g) + 2B(g) → 3C(g)
D. 2A(g) +B(g) → 4C(g)
E. More than one of the above
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