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Entropy
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Questions (178)
Determine ∆G° (in kcal) for the reaction
CCl4(ℓ) + H2(g) HCl(g) + CHCl3(ℓ) at 25 °C under standard conditions. The
3 answers
asked by
Anonymous
2,097 views
If 1 mol of ice melts at its melting point of 273 K, the entropy change for the ice is 22.0 J/K. If the ice melts in someone’s
4 answers
asked by
MONICA
1,616 views
Calculate the entropy change accompanying conversion of 1 mole of ice at 273 K and 1 atm pressure into steam at 373 K and 1 atm
2 answers
asked by
Mahesh
1,338 views
What would cause entropy to increase in a reaction?
A. The products forming a more rigid structure B. The products forming an
7 answers
asked by
Morgan
1,304 views
One end of a copper rod is immersed in boiling water at 100 degrees celsius and the other end in an ice-water mixture at 0
1 answer
asked by
Amanda
1,258 views
You measure Ksp for borax and find it to be 6.2 x 10-3 at 22.8°C. If the standard enthalpy change, ΔH°, for the dissolution
2 answers
asked by
Anonymous
1,226 views
true or false
Entropy always tend to favor mixing Mixing result in positive change in entropy Entropy allows endothermic
2 answers
asked by
Jazz
1,151 views
After 6.00 kg of water at 80.4 oC is mixed in a perfect thermos with 3.00 kg of ice at 0.0 oC, the mixture is allowed to reach
1 answer
asked by
angie
1,053 views
Entropy of melting
A block of a certain substance (m = 0.3 kg) sits in a cold room at its melting point 170 K. A lab demonstrator
2 answers
asked by
michael
1,046 views
What is the change in entropy when 0.290 g of silicon is burned in excess oxygen to yield silicon dioxide at 298 K?
Si(s) + O2(g)
2 answers
asked by
Anonymous
1,017 views
why is 1mol of so3 gas higher in entropy than so2 gas
1 answer
asked by
cynthia
995 views
Find the entropy change of the universe when 2 moles of water freezes at -10 degrees celsius. The delta G for the freezing of
1 answer
asked by
Linda
931 views
What is the absolute entropy of 3.1 mol of gaseous ammonia at 1.8 bar and 298 K?
1 answer
asked by
ketan
875 views
Which would have greater entropy?
1. Br2 or 2Br? 2. CH4 at 25 Celsius or CH4 at 45 Celsius? 3. 1 mol CH4 in 1-L H2O or 1 mol CH4
1 answer
asked by
Taasha
903 views
If 1 mol of ice melts at its melting point of 273 K, the entropy change for the ice is 22.0 J/K. If the ice melts in someone’s
2 answers
asked by
Taylor
895 views
Calculate the standard entropy change for the following reaction.
2 Al(s) + Fe2O3(s) → 2 Fe(s) + Al2O3(s)
3 answers
asked by
Kymora
872 views
Which substance has the higher entropy?
a.) a sample of pure silicon (to be used in a computer chip)or a piece of silicon
2 answers
asked by
Sha
839 views
A thermally insulated 50ohm resistor carries a current of 1A for 1s. The initial temperature of the resistor is 10degree, its
1 answer
asked by
Salando
804 views
A 298.0 kg block of ice at 0 C is placed in a large lake. The temperature of the lake is just slightly higher than 0 C, and the
1 answer
asked by
Kimmy
789 views
A 200 kg block of ice at 0.0c is placed in a large lake the temperature of the lake is just slightly higher than 0 C and the ice
1 answer
asked by
Stan
776 views
Predict the sign of Delta S in the system for each of the following reactions.
2H3O^+(aq) + CO3^2-(aq) ---> CO2(g) + 3H2O(l) -,+,
1 answer
asked by
Anonymous
749 views
Explain why each of the following is incorrect:
(a) Entropy increases in all spontaneous reactions. Wouldn't (a) be actually
7 answers
asked by
Robert
805 views
consider the following reaction at 298K
4Al(s)+3O2(g) yields 2Al2O3(s) delta H= -3351.4 Kj find delta S sys find delta S surr
1 answer
asked by
Jessica
780 views
Which of the following would have a positive change in standard entropy at constant temperature? Choose all that apply.
A)
2 answers
asked by
Nick
737 views
When two similar liquids mix to form a solution, the entropy of solution is expectted to be:
a.negative b.zero c.positive
1 answer
asked by
Sarah
735 views
fus = 12.5 and vap = 93.2 both j/k x mol
Determine the entropy change when 7.30 mol of HCL(g) condenses at atmospheric pressure.
1 answer
asked by
Talaya
732 views
Calculate the increase of entropy (in J/K) when 75 g of ice melts at 0 ºC and 1 atm. (The heat of fusion for ice is 6,000
2 answers
asked by
Emily Couroso
722 views
What is the change in entropy when 9.30 mL of liquid benzene (C6H6, d = 0.879 g/mL) is burned in the
presence of 37.2 L of oxygen
2 answers
asked by
Jonathan
677 views
The standard molar entropy of lead(II) bromide (PbBr2) is 161 J/mol • K. What is the entropy of 2.45 g of PbBr2?
a. +1.07 J/K
2 answers
asked by
Taylor
688 views
During a spontaneous chemical reaction, it is found that äSsys < 0. This means __________
a. äSsurr < 0 and its magnitude is <
2 answers
asked by
MONICA
672 views
A piece of metal at 80 degrees celsius is placed in 1.2 L of water at 72 degrees celsius. The system is thermally isolated and
1 answer
asked by
William
656 views
Which of the following processes is entropy increasing in the local system? You may select multiple processes.
Combination
2 answers
asked by
danny
649 views
How do I find delta S of 2 Na(s) + 2H2O(l) -> 2NaOH(aq) +H2(g)?
I tried to find it using this.... ^Srxn= 2S(NaOH) - S(H2) -2S(Na)
2 answers
asked by
Shana
624 views
When atmospheric pressure is 700. mmHg, water boils at 97.714 degrees C. Calculate entropy change of water if 50.0 grams is
1 answer
asked by
Chris
625 views
Consider a process in which an ideal gas is compressed to one-sixth of its original volume at constant temperature.
Calculate the
2 answers
asked by
Jematormal91
631 views
what effect does a catalyst have on entropy?
2 answers
asked by
Shaniquaa
592 views
list the following substances in order of increasing molar entropy at 25'c.
H2O(l), H2O(g), H2O(s), C(s), Ar (g) Explain your
2 answers
asked by
harry
617 views
What is the change in entropy when 6.03 mL of liquid benzene (C6H6, d = 0.879 g/mL) is combusted in the presence of 26.8 L of
2 answers
asked by
Anonymous
614 views
A 72.2 g ice cube floats in the Arctic Sea. The temperature and pressure of the system and surroundings are at 1 atm and 0°C.
1 answer
asked by
Bree
604 views
Find the entropy change of the universe when 2 mol of water freezes at -10 degrees celsius.
1 answer
asked by
Linda
591 views
Compute the entropy change of a system consisting of 1kg of ice at 0•C which melts (reversibly) to water at the same
2 answers
asked by
Anonym
595 views
Calculate the entropy change of the universe (in J/K) when 43.4 g of ethanol vapor is condensed in a laboratory at 20.4 oC.
3 answers
asked by
Student
578 views
Can someone just get me started on this im not sure of how to go about solving this.
The heat of vaporization of carbon
2 answers
asked by
steve
555 views
Calculate the change of entropy of 1 kg of air expanding polytropically in a cylinder behind a
piston from 7 bar and 600°C to
1 answer
asked anonymously
28 views
A thermally insulated 50ohm resistor carries a current of 1A for 1s. The initial temperature of the resistor is 10degree, its
2 answers
asked by
Salando
560 views
3.5 moles of steam at 100 C are condensed at 100 C and the resulting water is cooled to 42.3 C. Calculate the entropy change for
2 answers
asked by
baranse
555 views
which one has more entropy?
A mole of nitrogen gas at STP or a mole of nitrogen gas at 200 K have?
2 answers
asked by
Derek S.
515 views
For which of the following will delta S be the most positve?
A) Co2(g)->CO2(s) B) C6H12O6 (s)+ 6 O2(g) -> 6 Co2(g) + 6H20(g) C)
2 answers
asked by
Jamy
540 views
Find the change in entropy when 1.25 kg of steam at 100OC condenses and cools to 50OC. Can someone please give me a hint how to
2 answers
asked by
Rign3
528 views
calculate the change in entropy when liquid mercury is vaporized.
Hg(l) = 75.9 J/mol K Hg(g) = 175.0 J/mol K
2 answers
asked by
Anonymous
517 views
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Parent Categories (19)
Chemistry
Energy and Thermodynamics
Gas Laws
Heat Transfer
Ideal Gas Laws
Information Theory
Phase Changes
Physics
Probability and Statistics
Properties of substances
Reactions
Solid State Physics
Solution Chemistry
Solutions
States of Matter
Stoichiometry
Thermochemistry
Thermodynamics
Thermodynamics and Chemical Reactions