EXP5-chm171L - alpy of solut ion: l = 5.56 mol H 20 Xa=3.67...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
olar Enthalpy ol= 5.56 mol H20 2038 +5.56 nd X H20= (1-0.00366658) =.9996 20 (MW H20)=AVMW 9996) (18)= 18.0122 n (cal/mol) py of solution) H/8a)nb Xa=3.67 X10-4 X10-4)3] – [(2X1010) (3.67X10-4)3] X10-4)2] – [3(2X1010) (3.67X10-4)2] X10-4)] – [3(53,821) (367X10-4)2] 20 4] (4X1011X(3.67X10-4)4] – (4X108(3.6710-4)2)] + 1060.2 halpy of solution: 0) x3 + (6x107) x2-53,821x = 3.801 1) + (Na+Np) (3Na2)] + ([(na2) (2) (Na+Np) (1) + (Na+hb) (Na+hb)2 (1) + (Na+hb)3(1)]-0 all terms ( Na+Nb )2 a2-38Xa2+2CXa-30Xa-D CHM171L / A11 Physical Chemistry Laboratory 2 3 rd Quarter S.Y. 2010-2011 Thermodynamics of Mixtures: Determination of Partial Molar Enthalpy Austria, Maynard 1 , Co, Argenia B. 2 1 Professor, CHM171L/A31, School of Chemical Engineering, Chemistry and Biotechnology, Mapua Institute of Technology; 2 Student, CHM171L /A31 , School of Chemical Engineering, Chemistry and Biotechnology, Mapua Institute of Technology ABSTRACT Experiment 5 is about thermodynamics of mixtures. In this experiment, we are going to use the PARR 1455 Solution Calorimeter to determine the partial molar enthalpy of ammonium chloride-water solution by different amounts of ammonium chloride in the same volume of water. We started with atleast 0.1 g sample of ammonium chloride having 10 different masses with atleast 0.1g increment and placed it in the Teflon dish. The main purpose of this experiment is to determine the effect of composition of the different components of the mixture on the molar enthalpy of the solution. In addition, we will have to evaluate the partial molar enthalpy of the different components of the mixture. We got very large values. The partial molar enthalpy of Ammonium Chloride is higher than the molar enthalpy of water. Furthermore, when the mole fraction of ammonium chloride increases, the molar enthalpy of the solution decreases. As the experiment ended, using the PARR 1455 Solution Calorimeter, the different moles of ammonium chloride is used to determine the molar enthalpy of the solution and the molar enthalpy of ammonium chloride and water using the analytical method INTRODUCTION When a chemical reaction has taken place, it is usual that the products have either less stored energy than the reactants or more stored energy than the reactants. When chemical reactions take place, chemical bonds are broken in the reactants and
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 07/31/2011 for the course CHE-CHM-BT CHM171L taught by Professor Calderon during the Spring '11 term at Mapúa Institute of Technology.

Page1 / 4

EXP5-chm171L - alpy of solut ion: l = 5.56 mol H 20 Xa=3.67...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online