AP Chemistrymediummcq1 pt
Which statement about work in chemistry is correct?
A.Gas expansion against a piston does P–V work on the surroundings
B.Gases never do work
C.Work is a state function
D.Work always equals heat
Explanation
Core Concept
When a system's gas pushes a piston outward, it performs work (w < 0). ΔU = q + w accounts for both heat and this mechanical work.
Correct Answer
AGas expansion against a piston does P–V work on the surroundings
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