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In an freezing point depression experiment, 6 g naphthalene was weighed. Naphthalene was heated until melting's and completely turning liquid and allowed to cool. Until all of the naphthalene freezes, temperature was measured for every 30 second to plot a curve. As a result of the measurements, it was showed that naphthalene melts at 74°C. Then 1 g of sulfur was added on naphthalene, and the experiment was repeated. The mixture was melted at 69°C. If the freezing point depression constant (Ka) for naphthalene is 6,8 °C/ m, calculate the molar mass of sulfur and find % error by mass. S=32;( Note : sulfur is Ss)

In an freezing point depression experiment, 6 g naphthalene was weighed. Naphthalene was heated until melting's and completely turning liquid and allowed to cool. Until all of the naphthalene freezes, temperature was measured for every 30 second to plot a curve. As a result of the measurements, it was showed that naphthalene melts at 74°C. Then 1 g of sulfur was added on naphthalene, and the experiment was repeated. The mixture was melted at 69°C. If the freezing point depression constant (Ka) for naphthalene is 6,8 °C/ m, calculate the molar mass of sulfur and find % error by mass. S=32;( Note : sulfur is Ss)

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
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In an freezing point depression experiment, 6 g naphthalene was weighed. Naphthalene was heated until melting's and completely turning liquid and allowed to cool. Until all of the naphthalene freezes, temperature was measured for every 30 second to plot a curve. As a result of the measurements, it was showed that naphthalene melts at 74°C. Then 1 g of sulfur was added on naphthalene, and the experiment was repeated. The mixture was melted at 69°C. If the freezing point depression constant (Ka) for naphthalene is 6,8 °C/ m, calculate the molar mass of sulfur and find % error by mass. S=32 ;( Note : sulfur is Ss)
Transcribed Image Text:In an freezing point depression experiment, 6 g naphthalene was weighed. Naphthalene was heated until melting's and completely turning liquid and allowed to cool. Until all of the naphthalene freezes, temperature was measured for every 30 second to plot a curve. As a result of the measurements, it was showed that naphthalene melts at 74°C. Then 1 g of sulfur was added on naphthalene, and the experiment was repeated. The mixture was melted at 69°C. If the freezing point depression constant (Ka) for naphthalene is 6,8 °C/ m, calculate the molar mass of sulfur and find % error by mass. S=32 ;( Note : sulfur is Ss)
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