From b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b Mon Sep 17 00:00:00 2001
From: priyanka
Date: Wed, 24 Jun 2015 15:03:17 +0530
Subject: initial commit / add all books

---
 647/CH9/EX9.18/Example9_18.sce | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100755 647/CH9/EX9.18/Example9_18.sce

(limited to '647/CH9/EX9.18')

diff --git a/647/CH9/EX9.18/Example9_18.sce b/647/CH9/EX9.18/Example9_18.sce
new file mode 100755
index 000000000..66c6a0b23
--- /dev/null
+++ b/647/CH9/EX9.18/Example9_18.sce
@@ -0,0 +1,26 @@
+clear;
+clc;
+
+// Example: 9.18
+// Page: 364
+
+printf("Example: 9.18 - Page: 364\n\n");
+
+// Solution
+
+//*****Data******//
+n1 = 0.7;// [moles of helium]
+n2 = 0.3;// [moles of argon]
+R = 8.314;// [J/mol K]
+T = 273 + 25;// [K]
+//******************//
+
+n = n1 + n2;// [total moles]
+x1 = n1/n;// [mole fraction of helium]
+x2 = n2/n;// [mole fraction of argon]
+deltaG_mix = n*R*T*(x1*log(x1) + x2*log(x2));// [J]
+printf("The free energy change of mixing is %.2f J\n",deltaG_mix);
+
+// Since the gases are ideal:
+deltaH_mix = 0;// [J]
+printf("The enthalpy change of mixing is %d J\n",deltaH_mix);
\ No newline at end of file
-- 
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