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25 de Mar de 2023•0 recomendaciones•9 vistas

25 de Mar de 2023•0 recomendaciones•9 vistas

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Answer the following true or false. Explain. (a) As a spring is compressed adiabatically, its internal energy increases. (b) Energy transfers by heat are induced only as a result of a temperature difference between a system and its surroundings. (c) The total energy of a closed system can change as a result of energy transfer across the system boundary by heat and work and energy transfer accompanying mass flow across the boundary. (d) The change in kinetic energy, in Btu, of a 10-lb mass whose velocity decreases from 100 ft/s to 50 ft/s is 1.5 Btu. (e) In this book, heat transfer to a closed system and work done on a closed system are each considered positive: Q > 0 and W > 0, respectively. Solution a) true because of atomoc spin and interatomic vibration, internal energy of spring increases when it compressed b) False latent heat occurs at constant temperature, also pressure difference like compression and pressure results in heat c) False Because in open system mass is not allowed, energy transfer may occur interms of heat and work d) fALSE it is 3.16 btu e) True.

- 1. Answer the following true or false. Explain. (a) As a spring is compressed adiabatically, its internal energy increases. (b) Energy transfers by heat are induced only as a result of a temperature difference between a system and its surroundings. (c) The total energy of a closed system can change as a result of energy transfer across the system boundary by heat and work and energy transfer accompanying mass flow across the boundary. (d) The change in kinetic energy, in Btu, of a 10-lb mass whose velocity decreases from 100 ft/s to 50 ft/s is 1.5 Btu. (e) In this book, heat transfer to a closed system and work done on a closed system are each considered positive: Q > 0 and W > 0, respectively. Solution a) true because of atomoc spin and interatomic vibration, internal energy of spring increases when it compressed b) False latent heat occurs at constant temperature, also pressure difference like compression and pressure results in heat c) False Because in open system mass is not allowed, energy transfer may occur interms of heat and work d) fALSE it is 3.16 btu e) True