Principles of Modern Chemistry
8th Edition
ISBN: 9781305079113
Author: David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher: Cengage Learning
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Chapter 2, Problem 14P
Interpretation Introduction
Interpretation: The empirical formula of the compound should be derived by using the given information.
Concept introduction: An empirical formula of a chemical compound expresses the proportions of the constituting elements present in a compound but not the actual number of atoms in the compound.
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Use the observations about each chemical reaction in the table below to decide the sign (positive or negative) of the reaction enthalpy AH and reaction entropy
AS.
Note: if you have not been given enough information to decide a sign, select the "unknown" option.
reaction
observations
conclusions
ΔΗ is
(pick one)
A
This reaction is faster above 103. °C than
below.
AS is
(pick one)
ΔΗ is
(pick one)
B
This reaction is spontaneous only above
-9. °C.
AS is
(pick one)
ΔΗ is
(pick one)
C
The reverse of this reaction is always
spontaneous.
AS is
(pick one)
18
Ar
Use the observations about each chemical reaction in the table below to decide the sign (positive or negative) of the reaction enthalpy AH and reaction entropy
AS.
Note: if you have not been given enough information to decide a sign, select the "unknown" option.
reaction
observations
conclusions
A
The reverse of this reaction is always
spontaneous but proceeds slower at
temperatures below 41. °C.
ΔΗ is
(pick one)
AS is
(pick one)
ΔΗ is
(pick one)
B
This reaction is spontaneous except above
94. °C.
AS is
(pick one)
This reaction is always spontaneous, but
ΔΗ is
(pick one)
C
proceeds slower at temperatures below
−14. °C.
AS is
(pick one)
Х
00.
18
Ar
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B
1
1
Draw the product of the reaction shown below. Ignore inorganic
byproducts.
+
H
CH3CH2OH
HCI
Drawing
Chapter 2 Solutions
Principles of Modern Chemistry
Ch. 2 - A newly synthesized compound has the molecular...Ch. 2 - Acetaminophen is the generic name of the pain...Ch. 2 - Arrange the following compounds from left to right...Ch. 2 - Arrange the following compounds from left to right...Ch. 2 - “Q-gas” is a mixture of 98.70% helium and 1.30%...Ch. 2 - A pharmacist prepares an antiulcer medicine by...Ch. 2 - Zinc phosphate is used as a dental cement. A...Ch. 2 - Bromoform is 94.85% bromine, 0.40% hydrogen, and...Ch. 2 - Fulgurites are the products of the melting that...Ch. 2 - A sample of a “suboxide” of cesium gives up...
Ch. 2 - Barium and nitrogen form two binary compounds...Ch. 2 - Prob. 12PCh. 2 - Prob. 13PCh. 2 - Prob. 14PCh. 2 - The empirical formula of a gaseous fluorocarbon is...Ch. 2 - At its boiling point (280°C) and at atmospheric...Ch. 2 - A gaseous binary compound has a vapor density that...Ch. 2 - A gaseous binary compound has a vapor density that...Ch. 2 - Prob. 19PCh. 2 - Prob. 20PCh. 2 - For each of the following chemical reactions,...Ch. 2 - Prob. 22PCh. 2 - An 18.6-g sample of K2CO3 was treated in such a...Ch. 2 - Prob. 24PCh. 2 - Disilane (Si2H6) is a gas that reacts with oxygen...Ch. 2 - Tetrasilane (Si4H10) is a liquid with a density of...Ch. 2 - Cryolite (Na3AlF6) is used in the production of...Ch. 2 - Carbon disulfide (CS2) is a liquid that is used in...Ch. 2 - Potassium nitrate (KNO3) is used as a fertilizer...Ch. 2 - Elemental phosphorus can be prepared from...Ch. 2 - An element X has a dibromide with the empirical...Ch. 2 - An element A has a triiodide with the formula AI3...Ch. 2 - A mixture consisting of only sodium chloride...Ch. 2 - A mixture of aluminum and iron weighing 9.62 g...Ch. 2 - When ammonia is mixed with hydrogen chloride...Ch. 2 - The poisonous gas hydrogen cyanide (HCN) is...Ch. 2 - The iron oxide Fe2O3 reacts with carbon monoxide...Ch. 2 - Titanium dioxide, TiO2 , reacts with carbon and...Ch. 2 - Human parathormone has the impressive...Ch. 2 - A white oxide of tungsten is 79.2976% tungsten by...Ch. 2 - A dark brown binary compound contains oxygen and...Ch. 2 - A binary compound of nickel and oxygen...Ch. 2 - Two binary oxides of the element manganese...Ch. 2 - A possible practical way to eliminate oxides of...Ch. 2 - Aspartame (molecularformula C14H18N2O5 ) is a...Ch. 2 - Prob. 46APCh. 2 - Prob. 47APCh. 2 - Citric acid (C6H8O7) is made by fermentation of...Ch. 2 - Prob. 49APCh. 2 - A sample of a substance with the empirical formula...Ch. 2 - A newspaper article about the danger of global...Ch. 2 - In the Solvay process for producing sodium...Ch. 2 - A yield of 3.00gKClO4 is obtained from the...Ch. 2 - Prob. 54APCh. 2 - Silicon nitride (Si3N4) , a valuable ceramic, is...
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