6.75 When 1 mol of CS,(I) forms from its elements at 1 atm and 25°C, 89.7 kJ of heat is absorbed, and it takes 27.7 kJ to vaporize 1 mol of the liquid. How much heat is absorbed when 1 mol of CS2(g) forms from its elements at these conditions?
6.75 When 1 mol of CS,(I) forms from its elements at 1 atm and 25°C, 89.7 kJ of heat is absorbed, and it takes 27.7 kJ to vaporize 1 mol of the liquid. How much heat is absorbed when 1 mol of CS2(g) forms from its elements at these conditions?
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Question
75 please

Transcribed Image Text:6.84 Cop
Cu2O
B
Given A.
6.85 Ace
CH2(g)
Given A
-241.8
Figure P6.72
Figure P6.73
6.74 At a given set of conditions, 241.8 kJ of heat is released
when 1 mol of H,O(g) forms from its elements. Under the same
conditions, 285.8 kJ is released when 1 mol of H,O(l) forms from
its elements. Find AH for the vaporization of water at these
Conditions.
Probler
6.86 TI
current.
tion tha
6.75 When 1 mol of CS,(1) forms from its elements at 1 atm and
25°C, 89.7 kJ of heat is absorbed, and it takes 27.7 kJ to vaporize
1 mol of the liquid. How much heat is absorbed when1 mol of
CS2(g) forms from its elements at these conditions?
2F
(a) Use
(b) Us
(1) Pb
Problems in Context
6.76 Diamond and graphite are two crystalline forms of carbon.
At 1 atm and 25°C, diamond changes to graphite so slowly that
the enthalpy change of the process must be obtained indirectly.
Using equations from the list below, determine AH for
(2) SC
Comp
C(diamond)-
C(graphite)
CO2(8)
6.87
AH = -395.4 kJ
(1) C(diamond) + O2(8)
(2) 2CO2(g)
(3) C(graphite) + O2(g) → CO2(8)
(4) 2CO(8) :
hydrc
It is u
2CO(g) + O2(8)
AH = 566.0 kJ
AH = -393.5 kJ
foun
C(graphite) + CO2(g) AH=-172.5 kJ
you e
(a) V
Standard Enthalpies of Reaction (AHn)
(Sample Problems 6.10 and 6.11)
gase
(b)
-94
(c)
Concept Review Questions
stea
6.77 What is the difference between the standard enthalpy of for-
mation and the standard enthalpy of reaction?
(d)
fat;
6.78 How are AH? values used to calculate AHn?
Enthalpy, H
Enthalpy, H
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