The amount of heat supplied to an ideal gas is laid off on the horizontal axis and the amount of work performed by the g-as is laid off on the vertical axis. One of the straight lines in the ligure is an isotherm and the other two are isobars of two gases. The initial states of hoth gases (pressure, temperature, volume) are the same, and the scales on the two axes coincide. Which straight line corresponds to which process? How many degrees of freedom does each gas have? (Vibrational degrees of freedom are not to be taken into account.) The graphs of what processes coincide with the coordinate axes?