Air in a piston/cylinder combination is being heated at a rate
of 50 kW. At a certain time, the temperature is 25C, the
pressure 200 kPa, the volume 2 m and the rate of volume
change is 0.2 m/s. What is the power produced by the
air and what is the rate of change in temperature in C/s at that
time?
A piston/cylinder contains helium at 500 K and 1200 kPa. It
expands polytropically with to a pressure of 100 kPa.
Find the final temperature, the specific work and specific heat
transfer in the process.
Part of a Stirling engine cycle is an isochoric heat addition.
Assume that the substance is 2kg of air and the pressure and
temperature before the heat addition are 1000 kPa and 27C. The
pressure is raised to 3000 kPa. Find the heat transfer using
properties from Table A.7.1
the heat capacity from Table A.5
UNGRADED: A insulated steel tank is divided into two parts of 3
m each by an initially locked piston. Side A has air at 200
kPa, 300 K, and side B has air at 1.0 MPa, 1000 K. The piston is now
unlocked so it is free to move, and it conducts heat so the air
comes to a uniform temperature . Find the mass in both A
and B, and the final and .