Log in
Chemistry
1
answer
0
watching
43
views
13 Dec 2019

Take temperatures and efficiencies to be exact. During a liquid-to-solid phase change of a substance, its change in entropy is −4.28×103 J/K .

If 1.58×106 J of heat is removed in the process, what is the freezing point of the substance in degrees Celsius?

Watch
1
answer
0
watching
43
views

For unlimited access to Homework Help, a Homework+ subscription is required.

Casey Durgan
Casey DurganLv2
16 Dec 2019

Unlock all answers

Get 1 free homework help answer.
Already have an account? Log in
Share
discord banner image
Join us on Discord
Chemistry Study Group
Join now

Related textbook solutions

Basic Chemistry
5 Edition,
Timberlake
ISBN: 9780134138046
Principles of Chemistry Molecular Approach
4th Edition,
Tro
ISBN: 9780134112831
Chemistry: Structure and Properties
2nd Edition,
Tro
ISBN: 9780134293936
Principles of Chemistry Molecular Approach
3rd Edition, 2014
Tro
ISBN: 9780321971944
Chemistry: A Molecular Approach
3rd Edition,
Tro
ISBN: 9780321809247
Chemistry: A Molecular Approach
5th Edition,
Tro
ISBN: 9780134874371
Principles of Chemistry: A Molecular Approach
4th Edition,
Tro
ISBN: 9780134895741
Chemistry: The Central Science
14th Edition, 2017
Brown
ISBN: 9780134414232

Related questions

For a certain substance the change in entropy on melting is 12.55 J/K for each mL of solid that melts. The melting point under 1.00 atm pressure is 6.1 °C, and the densities of the solid and liquid are 0.900 and 0.850 g/mL, respectively. What is the melting point under 1.00x104 atm pressure? Assume the solid and liquid are incompressible and that ΔfusS is not a function of temperature.

In this week's experiment, the heat of vaporization of liquid nitrogen is determined by measuring the change in temperature of a known sample of warm water when liquid nitrogen is added.

In one experiment, the mass of water is 104 grams, the initial temperature of the water is 69.3oC, the mass of liquid nitrogen added to the water is 60.6 grams, and the final temperature of the water, after the liquid nitrogen has vaporized, is 41.3oC.

Specific heat of water = 4.184 J K-1g-1

How much heat is lost by the warm water?

Heat lost = J

What is the heat of vaporization of nitrogen in J g-1?

Heat of vaporization = J g-1

What is the molar heat of vaporization of nitrogen?

Molar heat of vaporization = J mol-1

Trouton's constant is the ratio of the enthalpy (heat) of vaporization of a substance to its boiling point (in K). The constant is actually equal to the entropy change for the vaporization process and is most often a measure of the entropy in the liquid state. The value of the constant usually lies within the range 70 to 90 J K-1mol-1, with a value toward the lower end indicating high entropy in the liquid state.

The normal boiling point of liquid nitrogen is -196oC. Based upon your results above, what is the value of Trouton's constant?

Trouton's constant = J K-1mol-1

Weekly leaderboard

Home
Homework Help 3,900,000
Chemistry 830,000
Start filling in the gaps now
Log in