11.1 Two non-ideal gases may be mixed reversibly with semipermeable membranes (Fig. 11.1). When the coupled...

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11.1 Two non-ideal gases may be mixed reversibly with semipermeable membranes (Fig. 11.1). When the coupled membranes are moved slowly a small distance 8x, the whole system being kept at a constant tem- perature, an amount of heat &Q is rejected to the surroundings. Show that there will generally be a net force on the coupled membranes and calculate how it varies with temperature. 11.1 Two non-ideal gases may be mixed reversibly with semipermeable membranes (Fig. 11.1). When the coupled membranes are moved slowly a small distance 8x, the whole system being kept at a constant tem- perature, an amount of heat &Q is rejected to the surroundings. Show that there will generally be a net force on the coupled membranes and calculate how it varies with temperature.