A frictionless piston-cylinder connected to a linear spring is filled with saturated liquid ammonia at some...

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A frictionless piston-cylinder connected to a linear spring is filled with saturated liquid ammonia at some temperature (Tsat, Psat). When the piston touches the bottom of the cylinder, the spring is slightly compressed. The spring constant is K, and the cylinder has a uniform cross section A. The system is heated constantly by an external heat source, expanding the ammonia through vaporization, and pushing the piston at a constant speed of x. Express your answers in terms of given parameters. Ammonia X (a) If the specific internal energies of ammonia are uğ (vapor) and uf (liquid) at the beginning, what is the change in internal energy per unit mass of transformed vapor ? (b) If the specific volumes of ammonia are v (vapor) and vf (liquid) at the beginning, what is the change in specific volume per unit mass of transformed vapor ? (c) What is the change in the internal energy per volume change? (Hint: the final unit should be J/m³ or kJ/m³) (d) What is the change in the volume per change in internal energy? (e) What is the rate of change in the internal energy in kJ/s? (f) What the working power of ammonia? (g) What is the heating power from the external heat source? A frictionless piston-cylinder connected to a linear spring is filled with saturated liquid ammonia at some temperature (Tsat, Psat). When the piston touches the bottom of the cylinder, the spring is slightly compressed. The spring constant is K, and the cylinder has a uniform cross section A. The system is heated constantly by an external heat source, expanding the ammonia through vaporization, and pushing the piston at a constant speed of x. Express your answers in terms of given parameters. Ammonia X (a) If the specific internal energies of ammonia are uğ (vapor) and uf (liquid) at the beginning, what is the change in internal energy per unit mass of transformed vapor ? (b) If the specific volumes of ammonia are v (vapor) and vf (liquid) at the beginning, what is the change in specific volume per unit mass of transformed vapor ? (c) What is the change in the internal energy per volume change? (Hint: the final unit should be J/m³ or kJ/m³) (d) What is the change in the volume per change in internal energy? (e) What is the rate of change in the internal energy in kJ/s? (f) What the working power of ammonia? (g) What is the heating power from the external heat source?

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a The change in internal energy per unit mass of transformed vapor can be calculated using the formula u uvapor uliquid where uvapor and uliquid are t... View the full answer