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diff --git a/2873/CH11/EX11.1/Ex11_1.sce b/2873/CH11/EX11.1/Ex11_1.sce
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+// Display mode
+mode(0);
+// Display warning for floating point exception
+ieee(1);
+clear;
+clc;
+disp("Engineering Thermodynamics by Onkar Singh Chapter 11 Example 1")
+T1=(-16+273);//temperature of refrigerated space in K
+T2=(27+273);//temperature of atmosphere in K
+Q1=500;//heat extracted from refrigerated space in KJ/min
+disp("for refrigerator working on reversed carnot cycle.")
+disp("Q1/T1=Q2/T2")
+disp("so Q2=Q1*T2/T1 in KJ/min")
+Q2=Q1*T2/T1
+disp("and work input required,W in KJ/min")
+disp("W=Q2-Q1")
+W=Q2-Q1