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P (Pa) 3.0 x 105 a 2.0 x 105 1.0 x 105 (m³) о 0.02 0.04 0.06

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Question

A volume of air (assumed
to be an ideal gas) is first
cooled without changing its volume
and then expanded without
changing its pressure, as shown by
path abc in Fig. . (a) How
does the final temperature of the
gas compare with its initial temperature?
(b) How much heat does
the air exchange with its surroundings
during process abc? Does the air absorb heat or release heat during
this process? Explain. (c) If the air instead expands from state a to state c
by the straight-line path shown, how much heat does it exchange with its
surroundings?

P (Pa)
3.0 x 105
a
2.0 x 105
1.0 x 105
(m³)
о 0.02 0.04 0.06

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