Chapter 10, Problem 24PS

### Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

Chapter
Section

### Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

# Diethyl ether, (C2H5)2O, vaporizes easily at room temperature. If the vapor exerts a pressure of 233 mm Hg in a flask at 25 °C, what is the density of the vapor?

Interpretation Introduction

Interpretation:

The density of diethyl ether in a flask at 25°Candapressureof233mmHg has to be given.

Concept Introduction:

Density of a gas can be find out with the help of ideal gas equation which is

PV=nRT

n in the given equation can be written as mM Since amount of any substance is given by dividing mass with molar mass.

PV=mMRTmV=PMRTdensity=PMRT

Explanation

The density of diethyl ether vapour at 25Â°Câ€‰andâ€‰aâ€‰pressureâ€‰ofâ€‰233â€‰mmâ€‰Hg.

We know that densityâ€‰=â€‰PMRT

Given:

â€‚Â Molarâ€‰massâ€‰of(â€‰C2H5)2Oâ€‰â€‰â€‰=â€‰74.12â€‰g/molPâ€‰â€‰â€‰â€‰â€‰â€‰â€‰â€‰â€‰â€‰â€‰â€‰â€‰=â€‰â€‰â€‰233â€‰mmâ€‰Hgâ€‰â€‰=â€‰â€‰â€‰0.3065â€‰atmTâ€‰â€‰â€‰â€‰â€‰â€‰â€‰â€‰â€‰â€‰â€‰â€‰â€‰=â€‰25Â°Câ€‰â€‰â€‰

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