Calculate the change in entropy when one mole of metallic aluminum is heated at one bar pressure from aninitial temperature of 25 °C to a final temperature of 750 °C. The molar heat capacities of solid and liquidaluminum at one bar pressure are 29.2 J mol1 K1 and 31.75 J mol1 K1, respectively. The specific enthalpyof fusion of aluminum at its melting point (660.46 °C) is 396.57 J g1. The molar mass of aluminum is 26.98 gmol1.(Please explain as much as possible. Why did you use the equation? Or what conditions did you see from thequestion? etc)

Question
Asked Oct 31, 2019
14 views

Do not copy from others, please!

Calculate the change in entropy when one mole of metallic aluminum is heated at one bar pressure from an
initial temperature of 25 °C to a final temperature of 750 °C. The molar heat capacities of solid and liquid
aluminum at one bar pressure are 29.2 J mol1 K1 and 31.75 J mol1 K1, respectively. The specific enthalpy
of fusion of aluminum at its melting point (660.46 °C) is 396.57 J g1. The molar mass of aluminum is 26.98 g
mol1.
(Please explain as much as possible. Why did you use the equation? Or what conditions did you see from the
question? etc)
help_outline

Image Transcriptionclose

Calculate the change in entropy when one mole of metallic aluminum is heated at one bar pressure from an initial temperature of 25 °C to a final temperature of 750 °C. The molar heat capacities of solid and liquid aluminum at one bar pressure are 29.2 J mol1 K1 and 31.75 J mol1 K1, respectively. The specific enthalpy of fusion of aluminum at its melting point (660.46 °C) is 396.57 J g1. The molar mass of aluminum is 26.98 g mol1. (Please explain as much as possible. Why did you use the equation? Or what conditions did you see from the question? etc)

fullscreen
check_circle

Expert Answer

Step 1

The entropy change for melting of aluminum can be calculated as

help_outline

Image Transcriptionclose

Given, Melting point of Al-660.46 C 660.46+273.15K=933.61K Enthalpy of fusion of Al = 3 96.57 Jg 10699.45 J mol Entropy change of melting: AH(fusion)xnumber of moles AS T (fusion) (10699.45Jmol2)(1mol) 933.61K -11.46JK

fullscreen
Step 2

The entropy change for temperature of...

help_outline

Image Transcriptionclose

Entropy change of change in temperature: T 660.46+273 .15K=933.61K T, 750+273.15K=1023 .1 5K Т, AS, =Cln т, (1023 .15 (31.75Jmol K)(1mol) In 933.61 2.90JK

fullscreen

Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in

Science

Chemistry

Physical Chemistry

Related Chemistry Q&A

Find answers to questions asked by student like you
Show more Q&A
add
question_answer

Q: erences) Draw a structural formula of the SR configuration of the compound shown below. CH3 S NR HO ...

A: According to Cahn-Ingold-Prelog system,The group attached to asymmetric center should be ranked base...

question_answer

Q: Lead ions can be precipitated from solution with KCl according to the following reaction: Pb2+(aq)+2...

A: Given information:Mass of KCl = 28.6 gMass of lead ions (Pb2+) = 25.5 gMass of PbCl2 = 29.0 g

question_answer

Q: mheducation.com/tlow/connect.html Saved Click the "draw structure" button to launch the drawing util...

A: The structure of the compound 2,6-dichloro-4-methyl-4-Octanol:

question_answer

Q: An analytical chemist is titrating 226.0mL of a 0.8900M solution of diethylamine ((C2H5)2  NH) with ...

A: Given that,

question_answer

Q: 2. When oxalic acid is added, the iron (II) ions precipitate as iron(II) oxalate dihydrate.Fe2+ (aq)...

A: The complete given reaction is,

question_answer

Q: A sealed chamber contains 7.50 g CH4 and 14.5 g O2. The mixture is ignited producing CO2 and H2O. Ho...

A: According to the balanced chemical reaction shown as follows:

question_answer

Q: The reaction of salicylic acid, C7H6O3, with acetic anhydride, C2H6O3, produces aspirin, C9H8O4, and...

A: The balanced chemical equation for the reaction of salicylic acid (C7H6O3) with acetic anhydride (C4...

question_answer

Q: What is the percentage of C2H2 when 50.0 g of CaC2 reacts whith an excess of water to yield 13.5g C2...

A: Click to see the answer

question_answer

Q: 11

A: Given,Mass of sample = 24.865gPressure = ?Volume = 2.2855LTemperature = 374.21K