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diff --git a/1427/CH18/EX18.4/18_4.sce b/1427/CH18/EX18.4/18_4.sce
new file mode 100644
index 000000000..4777a51bc
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+++ b/1427/CH18/EX18.4/18_4.sce
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+//ques-18.4
+//Calculating enthalpy of formation of sucrose
+clc
+h1=-393.5;//heat of combustion of carbon (in kJ/mol)
+h2=-286.2;//heat of combustion of carbon (in kJ/mol)
+h3=-5644;//heat of combustion of carbon (in kJ/mol)
+H=12*h1+11*h2-h3;//enthalpy of formation (in kJ/mol)
+printf("Enthalpy of formation of sucrose is %.1f kJ/mol.",H);