Chemistry for Today: General, Organic, and Biochemistry
9th Edition
ISBN: 9781305960060
Author: Spencer L. Seager, Michael R. Slabaugh, Maren S. Hansen
Publisher: Cengage Learning
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Chapter 6, Problem 6.86E
Interpretation Introduction
Interpretation:
The validation to the fact that some people say they have hard time breathing on top of a tall mountain because there is less oxygen in the air they breathe is to be explained.
Concept Introduction:
The pressure exerted by the weight of the atmosphere is known as atmospheric pressure. The atmospheric pressure is different at different places. It is also known as barometric pressure.
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Using the conditions of spontaneity to deduce the signs of AH and AS
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
This reaction is always spontaneous, but
proceeds slower at temperatures above
120. °C.
ΔΗ is
(pick one)
AS is
(pick one)
ΔΗ is
(pick one)
B
This reaction is spontaneous except above
117. °C.
AS is
(pick one)
ΔΗ is
(pick one)
This reaction is slower below 20. °C than
C
above.
AS is
|(pick one)
?
18
Ar
1
Calculating the pH at equivalence of a titration
Try Again
Your answer is incorrect.
0/5
a
A chemist titrates 70.0 mL of a 0.7089 M hydrocyanic acid (HCN) solution with 0.4574M KOH solution at 25 °C. Calculate the pH at equivalence. The pK of
hydrocyanic acid is 9.21.
Round your answer to 2 decimal places.
Note for advanced students: you may assume the total volume of the solution equals the initial volume plus the volume of KOH solution added.
pH
=
11.43]
G
00.
18
Ar
B•
Chapter 6 Solutions
Chemistry for Today: General, Organic, and Biochemistry
Ch. 6 - Calculate the volume of 125g of the following...Ch. 6 - Calculate the volume of 125g of the following...Ch. 6 - Copper metal has a density of 8.92g/cm3 at 20.0C...Ch. 6 - Liquid water has a density of 1.00g/mL at 10.0C...Ch. 6 - Gallium metal melts at 29.8C. At the melting...Ch. 6 - Prob. 6.6ECh. 6 - Describe the change in form of energy kinetic...Ch. 6 - Prob. 6.8ECh. 6 - Prob. 6.9ECh. 6 - At 25.0C, helium molecules (He) have an average...
Ch. 6 - Prob. 6.11ECh. 6 - Prob. 6.12ECh. 6 - Explain each of the following observations using...Ch. 6 - Prob. 6.14ECh. 6 - The following statements are best associated with...Ch. 6 - Prob. 6.16ECh. 6 - Prob. 6.17ECh. 6 - Prob. 6.18ECh. 6 - Prob. 6.19ECh. 6 - Prob. 6.20ECh. 6 - Prob. 6.21ECh. 6 - Convert each of the following temperatures from...Ch. 6 - Prob. 6.23ECh. 6 - Prob. 6.24ECh. 6 - A 200.mL sample of oxygen gas is collected at...Ch. 6 - A 200.mL sample of nitrogen gas is collected at...Ch. 6 - Prob. 6.27ECh. 6 - Prob. 6.28ECh. 6 - What volume in liters of air measured at 1.00atm...Ch. 6 - What volume in liters of air measured at 1.00atm...Ch. 6 - Prob. 6.31ECh. 6 - Prob. 6.32ECh. 6 - Prob. 6.33ECh. 6 - Prob. 6.34ECh. 6 - A sample of gas has a volume of 375mL at 27C. The...Ch. 6 - What volume of gas in liters at 120.C must be...Ch. 6 - Prob. 6.37ECh. 6 - Prob. 6.38ECh. 6 - Prob. 6.39ECh. 6 - A helium balloon was partially filled with...Ch. 6 - You have a 1.50-L balloon full of air at 30.C. To...Ch. 6 - Prob. 6.42ECh. 6 - What minimum pressure would a 250.-mL aerosol can...Ch. 6 - Prob. 6.44ECh. 6 - Prob. 6.45ECh. 6 - Prob. 6.46ECh. 6 - Prob. 6.47ECh. 6 - Prob. 6.48ECh. 6 - Prob. 6.49ECh. 6 - The pressure gauge of a steel cylinder of methane...Ch. 6 - Suppose 12.0g of dry ice (solidCO2) was placed in...Ch. 6 - Prob. 6.52ECh. 6 - Prob. 6.53ECh. 6 - A sample of gaseous methyl ether has a mass of...Ch. 6 - A sample of gaseous nitrogen oxide is found to...Ch. 6 - A sample of gas weighs 0.176g and has a volume of...Ch. 6 - Prob. 6.57ECh. 6 - Prob. 6.58ECh. 6 - Prob. 6.59ECh. 6 - Prob. 6.60ECh. 6 - Prob. 6.61ECh. 6 - Prob. 6.62ECh. 6 - Prob. 6.63ECh. 6 - Classify each of the following processes as...Ch. 6 - Classify each of the following processes as...Ch. 6 - Prob. 6.66ECh. 6 - Prob. 6.67ECh. 6 - Prob. 6.68ECh. 6 - Prob. 6.69ECh. 6 - Prob. 6.70ECh. 6 - Prob. 6.71ECh. 6 - Prob. 6.72ECh. 6 - Prob. 6.73ECh. 6 - Prob. 6.74ECh. 6 - Prob. 6.75ECh. 6 - Using the specific heat data of Table 6.8,...Ch. 6 - Using the specific heat data of Table 6.8,...Ch. 6 - Prob. 6.78ECh. 6 - Prob. 6.79ECh. 6 - Liquid Freon (CCl2F2) is used as a refrigerant. It...Ch. 6 - Prob. 6.81ECh. 6 - What is the density of argon gas in g/mL at STP?Ch. 6 - Prob. 6.83ECh. 6 - Prob. 6.84ECh. 6 - Prob. 6.85ECh. 6 - Prob. 6.86ECh. 6 - Prob. 6.87ECh. 6 - Prob. 6.88ECh. 6 - Prob. 6.89ECh. 6 - Prob. 6.90ECh. 6 - Prob. 6.91ECh. 6 - Prob. 6.92ECh. 6 - Refer to Figure 6.12 and answer the question....Ch. 6 - Prob. 6.94ECh. 6 - Prob. 6.95ECh. 6 - Definite shape and definite volume best describes...Ch. 6 - Prob. 6.97ECh. 6 - Prob. 6.98ECh. 6 - Prob. 6.99ECh. 6 - Which of the following indicates the relative...Ch. 6 - Prob. 6.101ECh. 6 - Prob. 6.102ECh. 6 - What are the differentiating factors between...Ch. 6 - Prob. 6.104ECh. 6 - Prob. 6.105ECh. 6 - When a vapor condenses into a liquid: a.it absorbs...Ch. 6 - Prob. 6.107ECh. 6 - Prob. 6.108ECh. 6 - Prob. 6.109ECh. 6 - Prob. 6.110ECh. 6 - Prob. 6.111ECh. 6 - Prob. 6.112ECh. 6 - How much heat is required to raise the temperature...Ch. 6 - Prob. 6.115ECh. 6 - Prob. 6.116ECh. 6 - Prob. 6.117ECh. 6 - Prob. 6.118ECh. 6 - Prob. 6.119ECh. 6 - Prob. 6.120ECh. 6 - Prob. 6.121ECh. 6 - Prob. 6.122ECh. 6 - Prob. 6.123ECh. 6 - Prob. 6.124ECh. 6 - Prob. 6.125E
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- Using the conditions of spontaneity to deduce the signs of AH and AS 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 faster at temperatures above -48. °C. ΔΗ is (pick one) ✓ AS is (pick one) B This reaction is spontaneous except below 114. °C but proceeds at a slower rate below 135. °C. ΔΗ is (pick one) AS is (pick one) ΔΗ is C This reaction is exothermic and proceeds faster at temperatures above -43. °C. (pick one) AS is (pick one) v Х 5 ? 18 Ararrow_forwardion. A student proposes the following Lewis structure for the perchlorate (CIO) io : :0: : Cl : - - : :0: ك Assign a formal charge to each atom in the student's Lewis structure. atom central O formal charge ☐ top O ☐ right O ☐ bottom O ☐ Cl ☐arrow_forwardDecide whether these proposed Lewis structures are reasonable. proposed Lewis structure Yes. Is the proposed Lewis structure reasonable? Cl- : 2: :Z: :Z: N—N : 0: C C1: O CO No, it has the wrong number of valence electrons. The correct number is: ☐ No, it has the right number of valence electrons but doesn't satisfy the octet rule. The symbols of the problem atoms are:* ☐ Yes. No, it has the wrong number of valence electrons. The correct number is: ☐ No, it has the right number of valence electrons but doesn't satisfy the octet rule. The symbols of the problem atoms are:* | Yes. No, it has the wrong number of valence electrons. The correct number is: No, it has the right number of valence electrons but doesn't satisfy the octet rule. The symbols of the problem atoms are:* | If two or more atoms of the same element don't satisfy the octet rule, just enter the chemical symbol as many times as necessary. For example, if two oxygen atoms don't satisfy the octet rule, enter "0,0". ☑arrow_forward
- 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 Ararrow_forwardUse 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 무ㅎ B 1 1arrow_forwardDraw the product of the reaction shown below. Ignore inorganic byproducts. + H CH3CH2OH HCI Drawingarrow_forward
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