EP BASIC CHEMISTRY-STANDALONE ACCESS
6th Edition
ISBN: 9780134999890
Author: Timberlake
Publisher: PEARSON CO
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Chapter 3, Problem 82APP
A 1.3-g sample of rice is placed in a calorimeter. When the sample is burned, 22 kJ is given off. What is the energy value (kcal/g) for the rice? (3.6)
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Using reaction free energy to predict equilibrium composition
Consider the following equilibrium:
N2O4 (g) 2NO2 (g)
AG⁰ = 5.4 kJ
Now suppose a reaction vessel is filled with 1.68 atm of dinitrogen tetroxide (N204) at 148. °C. Answer the following questions about this system:
rise
Under these conditions, will the pressure of N2O4 tend to rise or fall?
x10
fall
Is it possible to reverse this tendency by adding NO2?
In other words, if you said the pressure of N2O4 will tend to rise, can that
be changed to a tendency to fall by adding NO2? Similarly, if you said the
pressure of N2O4 will tend to fall, can that be changed to a tendency to
rise by adding NO2?
If you said the tendency can be reversed in the second question, calculate
the minimum pressure of NO 2 needed to reverse it.
Round your answer to 2 significant digits.
yes
no
0.42 atm
☑
5
0/5
?
مله
Ar
Homework 13 (Ch17)
Question 4 of 4 (1 point) | Question Attempt: 2 of 2
✓ 1
✓ 2
= 3
4
Time Remaining: 4:25:54
Using the thermodynamic information in the ALEKS Data tab, calculate the standard reaction free energy of the following chemical reaction:
2CH3OH (g)+302 (g) → 2CO2 (g) + 4H₂O (g)
Round your answer to zero decimal places.
☐ kJ
x10
☐
Subm
Check
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Identifying the major species in weak acid or weak base equilibria
Your answer is incorrect.
• Row 2: Your answer is incorrect.
• Row 3: Your answer is incorrect.
• Row 6: Your answer is incorrect.
0/5
The preparations of two aqueous solutions are described in the table below. For each solution, write the chemical formulas of the major species present at
equilibrium. You can leave out water itself.
Write the chemical formulas of the species that will act as acids in the 'acids' row, the formulas of the species that will act as bases in the 'bases' row, and the
formulas of the species that will act as neither acids nor bases in the 'other' row.
You will find it useful to keep in mind that HF is a weak acid.
acids:
HF
0.1 mol of NaOH is added to
1.0 L of a 0.7M HF
solution.
bases:
0.13 mol of HCl is added to
1.0 L of a solution that is
1.0M in both HF and KF.
Exponent
other:
F
acids: HF
bases: F
other:
K
1
0,0,...
?
000
18
Ar
Chapter 3 Solutions
EP BASIC CHEMISTRY-STANDALONE ACCESS
Ch. 3.1 - Classify each of the following pure substances as...Ch. 3.1 - Classify each of the following pure substances as...Ch. 3.1 - Classify each of the following as a pure substance...Ch. 3.1 - Classify each of the following as a pure substance...Ch. 3.1 - A dietitian includes one of the following mixtures...Ch. 3.1 - A dietitian includes one of the following mixtures...Ch. 3.2 - Indicate whether each of the following describes a...Ch. 3.2 - Indicate whether each of the following describes a...Ch. 3.2 - Describe each of the following as a physical or...Ch. 3.2 - Describe each of the following as a physical or...
Ch. 3.2 - Prob. 11PPCh. 3.2 - Prob. 12PPCh. 3.2 - Prob. 13PPCh. 3.2 - Describe each of the following properties for the...Ch. 3.3 - Prob. 15PPCh. 3.3 - Prob. 16PPCh. 3.3 - Prob. 17PPCh. 3.3 - Calculate the unknown temperature in each of the...Ch. 3.3 - Prob. 19PPCh. 3.3 - Prob. 20PPCh. 3.4 - Prob. 21PPCh. 3.4 - Prob. 22PPCh. 3.4 - Prob. 23PPCh. 3.4 - Prob. 24PPCh. 3.4 - Prob. 25PPCh. 3.4 - Prob. 26PPCh. 3.4 - Prob. 27PPCh. 3.4 - Prob. 28PPCh. 3.5 - If the same amount of heat is supplied to samples...Ch. 3.5 - Substances A and B are the same mass and at the...Ch. 3.5 - Calculate the specific heat (J/g °C) for each of...Ch. 3.5 - Calculate the specific heat (J/g °C) for each of...Ch. 3.5 - Use the heat equation to calculate the energy, in...Ch. 3.5 - Use the heat equation to calculate the energy, in...Ch. 3.5 - Calculate the mass, in grams, for each of the...Ch. 3.5 - Prob. 36PPCh. 3.5 - Prob. 37PPCh. 3.5 - Prob. 38PPCh. 3.5 - Prob. 39PPCh. 3.5 - a. A 22.8-g piece of metal at 92.6 °C is dropped...Ch. 3.6 - Prob. 41PPCh. 3.6 - Prob. 42PPCh. 3.6 - Prob. 43PPCh. 3.6 - Prob. 44PPCh. 3.6 - Prob. 45PPCh. 3.6 - Prob. 46PPCh. 3.6 - Prob. 47PPCh. 3.6 - Prob. 48PPCh. 3.6 - When a 1.50-g sample of walnuts is burned in a...Ch. 3.6 - Prob. 50PPCh. 3.6 - Prob. 51PPCh. 3.6 - Prob. 52PPCh. 3 - Prob. 53UTCCh. 3 - Prob. 54UTCCh. 3 - Prob. 55UTCCh. 3 - Classify each of the following as a homogeneous or...Ch. 3 - Prob. 57UTCCh. 3 - Prob. 58UTCCh. 3 - Prob. 59UTCCh. 3 - Prob. 60UTCCh. 3 - Prob. 61UTCCh. 3 - Prob. 62UTCCh. 3 - Prob. 63UTCCh. 3 - Prob. 64UTCCh. 3 - Prob. 65APPCh. 3 - Classify each of the following as an element, a...Ch. 3 - Classify each of the following mixtures as...Ch. 3 - Prob. 68APPCh. 3 - Prob. 69APPCh. 3 - Prob. 70APPCh. 3 - Prob. 71APPCh. 3 - Prob. 72APPCh. 3 - Prob. 73APPCh. 3 - Prob. 74APPCh. 3 - Prob. 75APPCh. 3 - Calculate each of the following temperatures in...Ch. 3 - Prob. 77APPCh. 3 - Prob. 78APPCh. 3 - Prob. 79APPCh. 3 - Prob. 80APPCh. 3 - A 0.50-g sample of vegetable oil is placed in a...Ch. 3 - A 1.3-g sample of rice is placed in a calorimeter....Ch. 3 - A hot-water bottle for a patient contains 725 g of...Ch. 3 - Prob. 84APPCh. 3 - Prob. 85APPCh. 3 - Prob. 86APPCh. 3 - The following problems are related to the topics...Ch. 3 - The following problems are related to the topics...Ch. 3 - The following problems are related to the topics...Ch. 3 - The following problems are related to the topics...Ch. 3 - Prob. 91CPCh. 3 - Prob. 92CPCh. 3 - Gold, one of the most sought-after metals in the...Ch. 3 - Prob. 2CICh. 3 - Prob. 3CICh. 3 - Prob. 4CICh. 3 - In one box of nails weighing 0.250 lb, there are...Ch. 3 - A hot tub is filled with 450 gal of water. (2.5,...
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