quiz2_07 - MECH 310 Thermodynamics I January 7, 2008...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

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

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: MECH 310 Thermodynamics I January 7, 2008 American University of Beirut, Fall 2008 Handout # Quiz 2 Quiz 2 • This is a closed book exam. • You have 90 minutes. • Write your name and section number on both the question and answer sheets. • It is recommended that you read the whole exam before you start solving. Problem 1 (40 points) A rigid metal tank of volume V is connected to the atmosphere through a valve. At- mospheric pressure and temperature are p and T respectively. Initially the tank is evacuated and the valve is closed. The valve is then opened and air flows into the tank. During the first few seconds (from t = 0 to t = t 1 ), air flows rapidly into the tank at a decreasing mass flow rate until the pressure inside the tank increased, from zero to p . Following this fast process is another long process (from t = t 1 to t = t 2 ) during which air flows into the tank at a very small flow rate while the pressure in the tank remains p . The second process ends when the air flow goes to zero. Air is modeled as an ideal gas with specific heat ratio γ = c p /c v , with c p and c v are respectively the constant pressure and constant volume specific heats. (a) Argue why the first process may be modeled as adiabatic. (b) What is the temperature at time t = t 1 ? Express your answer in terms of given quantities. (c) What the amount of heat transfer between the tank and the atmosphere? Express your answer in terms of given quantities....
View Full Document

Page1 / 4

quiz2_07 - MECH 310 Thermodynamics I January 7, 2008...

This preview shows document pages 1 - 2. Sign up to view the full document.

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