p (Pa x 10) a b 2.0 V (m³) 0.010 0.040
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Question
The graph in
Fig. shows a pV-diagram
for 3.25 mol of ideal helium (He)
gas. Part ca of this process is isothermal.
(a) Find the pressure of the
He at point a. (b) Find the temperature
of the He at points a, b, and c.
(c) How much heat entered or left
the He during segments ab, bc, and
ca? In each segment, did the heat
enter or leave? (d) By how much
did the internal energy of the He change from a to b, from b to c, and
from c to a? Indicate whether this energy increased or decreased.
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