In figure p2040 the change in internal energy of a gas that, Ask an Expert

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In Figure P20.40, the change in internal energy of a gas that is taken from A to C is +800 J. The work done on the gas along path ABC is -500 J.

(a) How much energy must be added to the system by heat as it goes from A through B to C?

(b) If the pressure at point A is five times that of point C, what is the work done on the system in going from C to D?

(d) If the change in internal energy in going from point D to point A is +500 J, how much energy must be added to the system by heat as it goes from point C to point D?

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