Key to ME 113_S08 Exam1-Sec 02

Key to ME 113_S08 Exam1-Sec 02 - ME113 Spring 2008 Exam #1...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
ME113 Spring 2008 Exam #1 1 Key to Examination #1 ME113 – THERMODYNAMICS Spring 2008 – Section 02
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
ME113 Spring 2008 Exam #1 2 1. For a system to be in thermodynamic equilibrium, do the temperature and the pressure of the system have to be the same everywhere? Answer briefly. Yes. Thermodynamic equilibrium condition implies both thermal (temperature) and mechanical (pressure) conditions. Pressure and temperature are thermodynamic properties. 2. Most of the energy generated in the engine of an automobile is rejected to the air by the radiator through the circulating water. Should the radiator be modeled and analyzed as (A) a closed system (B) an open system (C) an adiabatic open system (D) a constant volume closed system Circle and explain your answer. Open system, since mass (hot water from engine) flows into and out of the radiator. 3. A rigid container is heated by the sun. There is no shaft work associated with the container. From the First Law of Thermodynamics, you determine the resulting work to be: (A) equal to the heat transfer (B) equal to the change in internal energy (C) equal to the volume times the change in pressure (D) equal to zero (E) equal to the change in enthalpy. Circle and explain your answer. The resulting work (boundary work) is zero, since d (change in volume) is zero for a rigid container. 4. During an isothermal process (A) the system pressure remains constant (B) the system temperature remains constant (C) there is no heat exchange between the system and the surrounding (D) the system volume remains constant Circle and explain your answer.
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 4

Key to ME 113_S08 Exam1-Sec 02 - ME113 Spring 2008 Exam #1...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online