A gas is confined to a cylindrical container having a movable, yet "snuggly-fitting," lid that slides up and down to accommodate changes in pressure and volume. The diagram shown below, outlines the steps in a heat cycle starting at position A and moving through positions B, C, D and then back to A.
The y-axis is pressure measured in atmospheres (1 atm = 1.01 x 105 Pa) and the x-axis is volume measured in multiples of 10-2 m3.
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