Physical Chemistry
2nd Edition
ISBN: 9781133958437
Author: Ball, David W. (david Warren), BAER, Tomas
Publisher: Wadsworth Cengage Learning,
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Textbook Question
Chapter 3, Problem 3.33E
Dentists might use a mixture of
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X(9) + 4Y(9) = 3Z(g)
K, = 3.12 x 10 2 bar 2 at a temperature of 287 °C.
Calculate the value of Ke.
b) Determine the standard enthalpy change and std. Gibbs free energy change of
reaction at 400 k for the reaction
СO(g) +2H2(g) — CHОН (g)
At 298.15 K, AH.co (0)= -26.41 kcal/mol, AH
AG.co (9)= -32.8079 kcal/mol, AG cH,oh(9)= -38.69 kcal/mol,
°.CH20H(9)= -48.08 kcal/mol,
The standard heat capacity of various components is given by,
CO = a + bT + cT² + dT³, where C, is in cal/mol-K and T is in K
b x10²
с х105
d x10°
Соmponent
CH3OH
а
4.55
2.186
-0.291
-1.92
CO
6.726
0.04
0.1283
-0.5307
H2
6.952
-0.0457
0.09563
-0.2079
24. A 500-cm^3 sample of1.0 M NaOH(aq)is added to
500cm3 of 1.0M HCl(aq)in a Styrofoam cup, and the
solution is quickly stirred. The rise in temperature (AT1) is
measured. The experiment is repeated using 100cm^3 of
each solution, and the rise in temperature (AT2) is
measured. What conclusion can you draw about AT1 and
AT2? HCl(aq)+NaOH(aq) H2O(1)+NaCL(aq); AH∞=-55.8KJ
a. AT1 is five times as large as AT2
b. AT1 is less than AT2
c. AT2 is greater than AT1
d. AT2 is equal to AT1
e. AT2 is five times as large as AT1
Chapter 3 Solutions
Physical Chemistry
Ch. 3 - Decide whether the following processes will be...Ch. 3 - Try to find one additional example of a...Ch. 3 - Consider the following quantities for a...Ch. 3 - Consider the following quantities for a four-step...Ch. 3 - What is the temperature of the low-temperature...Ch. 3 - What is the temperature of the high - temperature...Ch. 3 - Prob. 3.7ECh. 3 - Explain why the high-temperature reservoir of a...Ch. 3 - Superheated steam is steam with a temperature...Ch. 3 - Prob. 3.10E
Ch. 3 - The Carnot cycle is defined as having a certain...Ch. 3 - In thermodynamics, the pathway in a...Ch. 3 - A refrigerator is the reverse of an engine: Work...Ch. 3 - Efficiency is given by equations 3.5, 3.6, and...Ch. 3 - What is the entropy change for an ideal Carnot...Ch. 3 - What is the entropy change for the melting of...Ch. 3 - What is the entropy change for the solidification...Ch. 3 - Explain why the statement No process is 100...Ch. 3 - What is the change in entropy of 1.00mole of water...Ch. 3 - Prob. 3.20ECh. 3 - One mole of He warms up irreversibly at constant...Ch. 3 - Consider a monatomic ideal gas in a piston...Ch. 3 - A 0.500-mol sample of an ideal gas has an initial...Ch. 3 - SO2 in a piston chamber kept in a...Ch. 3 - A normal breath has a volume of about 1L. The...Ch. 3 - An automobile tire contains 15.6L of air at...Ch. 3 - An automobile tire contains 15.6L of air at...Ch. 3 - A sample of ideal gas from a compressed gas...Ch. 3 - Prob. 3.29ECh. 3 - In Example 3.5, a heat capacity of 20.78J/molK was...Ch. 3 - Prob. 3.31ECh. 3 - 4.00L of Ar and 2.50L of He, each at 298K and...Ch. 3 - Dentists might use a mixture of 40N2O and 60O2 as...Ch. 3 - A 5.33-g piece of Cu metal is heated to 99.7C in...Ch. 3 - A sample of 1.00mol of silver at 150C is placed in...Ch. 3 - Prob. 3.36ECh. 3 - What is the change in entropy when 2.22mol of...Ch. 3 - Estimate the entropy change of an 800-lb engine...Ch. 3 - Calculate the molar entropy change of the gas that...Ch. 3 - A normal breath is about 1L in volume. Assume you...Ch. 3 - The first law of thermodynamics is sometimes...Ch. 3 - Troutons rule states that the entropy of boiling...Ch. 3 - Prob. 3.43ECh. 3 - Argue from Boltzmanns definition for entropy that...Ch. 3 - Prob. 3.45ECh. 3 - Which system has the higher entropy? a A clean...Ch. 3 - Which system has the higher entropy? a 1g of solid...Ch. 3 - The absolute entropy of He at 298.15K is...Ch. 3 - The absolute entropy of Kr at 298.15K is...Ch. 3 - The element helium is thought to remain a liquid...Ch. 3 - Order the following substances in order of...Ch. 3 - The molar entropy change for a process is...Ch. 3 - What is the entropy change of a process if ...Ch. 3 - One mole of ideal gas expands isothermally and...Ch. 3 - Why isnt the entropy of elements in their standard...Ch. 3 - Determine the entropy of formation, fS, of the...Ch. 3 - The thermite reaction has solid aluminum powder...Ch. 3 - Prob. 3.58ECh. 3 - Determine the differences in the rxnS under...Ch. 3 - Calcium carbonate has two crystalline forms,...Ch. 3 - The chemical formula for gasoline can be...Ch. 3 - Prob. 3.62ECh. 3 - Prob. 3.63ECh. 3 - Plants take in CO2(g) and H2O(l) and make glucose,...Ch. 3 - Prob. 3.65ECh. 3 - Prob. 3.66ECh. 3 - Plots of Cp/T versus T are used to determine the...
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