Sea Water Thermodynamic Properties?


by tanky322
Tags: properties, thermodynamic, water
tanky322
tanky322 is offline
#1
Feb12-10, 08:04 AM
P: 43
Im looking for thermodynamic properties of seawater, especially specific heat and enthalpy. Im designing a solar desalinator, and im trying to determine the required amounts of energy to evaporate the water.

Is there a way in which I can determine the enthalpy of seawater by knowing the enthalpy of both salt and water?


Thank you
Phys.Org News Partner Science news on Phys.org
SensaBubble: It's a bubble, but not as we know it (w/ video)
The hemihelix: Scientists discover a new shape using rubber bands (w/ video)
Microbes provide insights into evolution of human language
Astronuc
Astronuc is offline
#2
Feb12-10, 08:39 AM
Admin
Astronuc's Avatar
P: 21,637
The density of seawater is about 1025 kg/m^3 and the specific heat is about 3850 J/(kg C).
http://sam.ucsd.edu/sio210/lect_2/lecture_2.html

http://www.tpub.com/weather3/1-17.htm

See last page -
http://www.whoi.edu/science/PO/peopl...e_notes_1b.pdf

http://www.math.nyu.edu/caos_teachin...sea_water.html

disclaimer: No endorsement expressed or implied
User must verify.
tanky322
tanky322 is offline
#3
Feb13-10, 10:57 AM
P: 43
Thank you!

tanky322
tanky322 is offline
#4
Feb14-10, 08:38 AM
P: 43

Sea Water Thermodynamic Properties?


Quote Quote by Astronuc View Post
The density of seawater is about 1025 kg/m^3 and the specific heat is about 3850 J/(kg C).
I think there is a unit issue with the specific heat of 3850 J/(Kg K), given that the specific heat of water is around 2200 KJ/(Kg K).

I just wanted to see if what im saying here is making sense.


Thanks
wehoosier
wehoosier is offline
#5
Apr1-11, 02:04 PM
P: 1
Kaiser Engineering did an extensive research study for the government on the thermodynamic properties of seawater about 40 years ago. The properties vary with the salinity, which also varies in different parts of the seas. It is available from the Library of Congress
AlephZero
AlephZero is offline
#6
Apr1-11, 04:45 PM
Engineering
Sci Advisor
HW Helper
Thanks
P: 6,386
Quote Quote by tanky322 View Post
I think there is a unit issue with the specific heat of 3850 J/(Kg K), given that the specific heat of water is around 2200 KJ/(Kg K).
3850 is the right order of magnitude, depending on the salinity.

See here - no disclaimers required for this source:
http://www.kayelaby.npl.co.uk/genera...2_7/2_7_9.html


Register to reply

Related Discussions
Thermodynamic Properties of high pressure gases Mechanical Engineering 6
Thermodynamic properties of charged ions Chemistry 1
Trying to find thermodynamic equations/properties for SteamTurbine/Condenser/pump/etc General Engineering 3
Basic question regarding triple point of water and physical properties of water Introductory Physics Homework 9