Answer
$\Delta p_1=-0.25$ atm/L, $\Delta p_2=-0.04$ atm/L
Work Step by Step
At $V=10$ L, the slope of the graph is
$-5$ atm/$20$L$=-0.25$ atm/L.
At $V=25$ L, the slope of the graph is
$-1$ atm/$25$ L=$-0.04$ atm/L.
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