Question

Question

545 J of work is done on a gas and changes the volume by-2.50 L. What is the external pressure? Assume that the
external pressure is constant over the change in volume. Give the answer to three significant figures.

Answer 1

W = -P_ext ΔV

545 J = -P_ext × (-2.50 L)

545 J = 2.50 P_ext L

P_ext = -218 Pa

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