initial commit / add all books

1 files changed, 18 insertions, 0 deletions

diff --git a/572/CH3/EX3.8/c3_8.sce b/572/CH3/EX3.8/c3_8.sce
new file mode 100755
index 000000000..e8147395f
--- /dev/null
+++ b/572/CH3/EX3.8/c3_8.sce
@@ -0,0 +1,18 @@
+//(3.8) A piston–cylinder assembly contains 0.9 kg of air at a temperature of 300K and a pressure of 1 bar. The air is compressed to a state where the temperature is 470K and the pressure is 6 bars. During the compression, there is a heat transfer from the air to the surroundings equal to 20 kJ. Using the ideal gas model for air, determine the work during the process, in kJ.

+

+//solutiion

+

+//variable initialization

+m = .9                              // mass of air in kg

+T1 = 300                            // initial temperature in kelvin

+P1 = 1                              // initial pressure in bar

+T2 = 470                            // final temperature in kelvin

+P2 = 6                              // final pressure in bar

+Q = -20                             // heat transfer in kj

+

+//from table A-22 

+u1 = 214.07                         // in KJ/kg

+u2 = 337.32                         // in KJ/Kg

+deltaU = m*(u2-u1)                  // change in internal energy in kj

+W = Q - deltaU                      // in KJ/kg

+printf('the work during the process in KJ is \n\t W = %f',W)