CHEMISTRY:CENTRAL SCIENCE-W/MOD.ACCESS
CHEMISTRY:CENTRAL SCIENCE-W/MOD.ACCESS
14th Edition
ISBN: 9780134809694
Author: Brown
Publisher: PEARSON
Question
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Chapter 11, Problem 45E

(a)

Interpretation Introduction

Interpretation: The amount of heat required to convert 42.0g of ethanol at 35°C to vapor phase at 78°C should be determined.

Concept Introduction:The enthalpy change for the conversion of ethanol from 35°C to 78°C of liquid ethanol is calculated as,
ΔH1=m×c×ΔT

Where,

  • ΔH1is the enthalpy change for this process.
  • m is the mass of ethanol.
  • c is the specific heat of liquid ethanol.
  • ΔT is the change in the temperature.
The number of moles of ethanol is calculated by the formula,

n=mM

Here,

  • n is the number of moles of ethanol.
  • m is the given mass of ethanol.
  • M is the molar mass of ethanol.
Enthalpy change is calculated as,

ΔH2=n×ΔHvap

Where,

  • ΔH2 is the enthalpy change during this process.
  • n is the moles of ethanol.
  • ΔHvap is the enthalpy of vaporization of ethanol.

(b)

Interpretation Introduction

Interpretation: The amount of heat required to convert 42.0g of ethanol at 155°C to vapor phase at 78°C should be determined.

Concept Introduction:The enthalpy change can be calculated as follows:

ΔH1=m×c×ΔT

Where,

  • ΔH1 is the enthalpy change for this process.
  • m is the mass of ethanol.
  • c is the specific heat of liquid ethanol.
  • ΔT is the change in the temperature.
The number of moles of ethanol is calculated by the formula,

n=mM

Here,

  • n is the number of moles of ethanol.
  • m is the given mass of ethanol.
  • M is the molar mass of ethanol.
Enthalpy change is calculated as,

ΔH2=n×ΔHvap

Where,

  • ΔH2 is the enthalpy change during this process.
  • n is the moles of ethanol.
  • ΔHvap is the enthalpy of vaporization of ethanol.

Blurred answer

Chapter 11 Solutions

CHEMISTRY:CENTRAL SCIENCE-W/MOD.ACCESS

Ch. 11.7 - Liquid crystalline phases are produced by which of...Ch. 11.7 - Prob. 11.6.2PECh. 11 - Prob. 1DECh. 11 - Prob. 1ECh. 11 - Prob. 2ECh. 11 - Prob. 3ECh. 11 - If 42.0 kj of heat is added to a 32.0-g sample of...Ch. 11 - Prob. 5ECh. 11 - The molecules have the same molecular formula...Ch. 11 - Prob. 7ECh. 11 - Prob. 8ECh. 11 - Prob. 9ECh. 11 - Prob. 10ECh. 11 - Prob. 11ECh. 11 - Prob. 12ECh. 11 - Prob. 13ECh. 11 - Prob. 14ECh. 11 - Prob. 15ECh. 11 - Prob. 16ECh. 11 - Describe the intermolecular forces that must be...Ch. 11 - Prob. 18ECh. 11 - List the following molecules in order of...Ch. 11 - True or false: a. For molecules with similar...Ch. 11 - Prob. 21ECh. 11 - Prob. 22ECh. 11 - Prob. 23ECh. 11 - Prob. 24ECh. 11 - Prob. 25ECh. 11 - Prob. 26ECh. 11 - Prob. 27ECh. 11 - Prob. 28ECh. 11 - Prob. 29ECh. 11 - Prob. 30ECh. 11 - A number of salts containing the tetrahedral...Ch. 11 - Prob. 32ECh. 11 - a. What is the relationship between surface...Ch. 11 - Prob. 34ECh. 11 - Prob. 35ECh. 11 - Prob. 36ECh. 11 - The boiling points, surface tension, and...Ch. 11 - Prob. 38ECh. 11 - Prob. 39ECh. 11 - Prob. 40ECh. 11 - Prob. 41ECh. 11 - Prob. 42ECh. 11 - 11.43 For many years drinking water has been...Ch. 11 - Prob. 44ECh. 11 - Prob. 45ECh. 11 - The fluorocarbon compound C2 Cl 3£'y has a normal...Ch. 11 - 11.47 Indicate whether each statement is true or...Ch. 11 - Prob. 48ECh. 11 - 11,49 Which of the following affects the vapor...Ch. 11 - Prob. 50ECh. 11 - Prob. 51ECh. 11 - Prob. 52ECh. 11 - Prob. 53ECh. 11 - Prob. 54ECh. 11 - Prob. 55ECh. 11 - Prob. 56ECh. 11 - Prob. 57ECh. 11 - Prob. 58ECh. 11 - Prob. 59ECh. 11 - Prob. 60ECh. 11 - Prob. 61ECh. 11 - Prob. 62ECh. 11 - Prob. 63ECh. 11 - Prob. 64ECh. 11 - In terms of the arrangement and freedom of motion...Ch. 11 - Prob. 66ECh. 11 - Prob. 67ECh. 11 - Prob. 68ECh. 11 - Prob. 69ECh. 11 - Prob. 70ECh. 11 - Prob. 71ECh. 11 - Prob. 72ECh. 11 - Prob. 73AECh. 11 - Prob. 74AECh. 11 - Prob. 75AECh. 11 - Prob. 76AECh. 11 - Prob. 77AECh. 11 - The table below shows the normal boiling points of...Ch. 11 - Prob. 79AECh. 11 - Prob. 80AECh. 11 - Prob. 81AECh. 11 - Prob. 82AECh. 11 - Prob. 83AECh. 11 - Prob. 84AECh. 11 - Prob. 85AECh. 11 - Prob. 86AECh. 11 - Prob. 87AECh. 11 - Prob. 88AECh. 11 - Prob. 89AECh. 11 - Prob. 90IECh. 11 - Prob. 91IECh. 11 - Prob. 92IECh. 11 - 11.93 The vapor pressure of ethanol (C2H5OH) at 19...Ch. 11 - Prob. 94IECh. 11 - Prob. 95IECh. 11 - Prob. 96IECh. 11 - Prob. 97IE
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