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| author | priyanka | 2015-06-24 15:03:17 +0530 |
|---|---|---|
| committer | priyanka | 2015-06-24 15:03:17 +0530 |
| commit | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (patch) | |
| tree | ab291cffc65280e58ac82470ba63fbcca7805165 /551/CH9/EX9.7 | |
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initial commit / add all books
Diffstat (limited to '551/CH9/EX9.7')
| -rwxr-xr-x | 551/CH9/EX9.7/7.sce | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/551/CH9/EX9.7/7.sce b/551/CH9/EX9.7/7.sce new file mode 100755 index 000000000..bf9d035b8 --- /dev/null +++ b/551/CH9/EX9.7/7.sce @@ -0,0 +1,61 @@ +clc
+
+ratio=1/8; //volume ratio; v1/v2
+T1=1223; //K
+
+cp_CO2=1.235; //kJ/kg K
+cp_O2=1.088; //kJ/kg K
+cp_N2=1.172; //kJ/kg K
+
+n_CO2=0.13;
+n_O2=0.125;
+n_N2=0.745;
+
+M_CO2=44;
+M_O2=32;
+M_N2=28;
+
+m_CO2=M_CO2*n_CO2;
+m_O2=M_O2*n_O2;
+m_N2=M_N2*n_N2;
+
+m=m_CO2 + m_O2 + m_N2;
+
+// Let Fraction by mass be denoted by F
+F_CO2=m_CO2/m;
+F_O2=m_O2/m;
+F_N2=m_N2/m;
+
+
+cp=F_CO2*cp_CO2 + F_O2*cp_O2 + F_N2*cp_N2;
+
+R0=8.314;
+R=F_CO2*R0/M_CO2 + F_O2*R0/M_O2 + F_N2*R0/M_N2;
+
+cv=cp - R;
+n=1.2;
+
+disp("(i) The workdone")
+T2=T1*(ratio)^(n-1);
+W=R*(T1-T2)/(n-1);
+disp("W=")
+disp(W)
+disp("kJ/kg")
+
+
+disp("(ii) The heat flow")
+du=cv*(T2-T1);
+Q=du + W;
+disp("Q=")
+disp(Q)
+disp("kJ/kg")
+
+
+disp("(iii) Change of entropy per kg of mixture")
+ds_1A=R*log(1/ratio); //isothermal process
+ds_2A=cv*log(T1/T2);
+
+ds_12=ds_1A - ds_2A;
+disp("change of entropy=")
+disp(ds_12)
+disp("kJ/kg K")
\ No newline at end of file |