Physics

Physics

Problem

A sample of ideal gas undergoes an adiabatic expansion and performs 150 J150\,\text{J} of work on the surroundings. Which set of signs for QQ, WW and ΔU\Delta U correctly describes the process? a) Q=0,  W=+,  ΔU=+Q = 0,\; W = +,\; \Delta U = + b) Q=−,  W=+,  ΔU=0Q = -,\; W = +,\; \Delta U = 0 c) Q=0,  W=+,  ΔU=−Q = 0,\; W = +,\; \Delta U = - d) Q=0,  W=−,  ΔU=+Q = 0,\; W = -,\; \Delta U = +

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