Heat of Fusion Lab Help needed


by Quantum Foam
Tags: fusion, heat
Quantum Foam
Quantum Foam is offline
#1
May29-04, 10:38 PM
P: 2
Hi, and thanks for looking

I'm doing a heat of fusion lab for school and I'm having trouble trying to find the equations that would solve the following:

Q (heat) released by liquid cooling down
Q (heat) absorbed by melted ice warming up
Q (heat) absorbed by ice while melting
/\ (delta or change of something) H fus of H2O.
The specific heat of alcohol

Any help would be great.

THanks again.
Phys.Org News Partner Chemistry news on Phys.org
Space-tested fluid flow concept advances infectious disease diagnoses
New, more versatile version of Geckskin: Gecko-like adhesives now useful for real world surfaces
Researcher develops novel wastewater treatment fabric
lvlastermind
lvlastermind is offline
#2
Jun9-04, 08:35 PM
P: 101
the specific heat of ice while melting is 2.06 J/gC
the specific heat of water is 4.18 J/gC
the heat of fusion is 334 J/g

my chem is a little rusty but isnt the delta H = to the change in temp (degrees C).

Now just set up ur problem first by writing out the knowns and unkowns.
Gokul43201
Gokul43201 is offline
#3
Jun10-04, 11:38 AM
Emeritus
Sci Advisor
PF Gold
Gokul43201's Avatar
P: 11,154
Quote Quote by Quantum Foam
Hi, and thanks for looking

I'm doing a heat of fusion lab for school and I'm having trouble trying to find the equations that would solve the following:

Q (heat) released by liquid cooling down
Q (heat) absorbed by melted ice warming up
Q (heat) absorbed by ice while melting
/\ (delta or change of something) H fus of H2O.
The specific heat of alcohol

Any help would be great.

THanks again.
/\[tex]H_{fus}(H_2O)[/tex] is the same as Q absorbed by ice while melting. It is also known as the latent heat of fusion or the latent heat of melting.

It would help to know what you are trying to calculate, and from what.

These may be useful :

1. Total heat lost by A = total heat gained by B (assuming no heat escapes)
2. During heating/cooling, Q = mC/\T, m:mass, C:sp. heat cap.
3. During boiling/melting/freezing, Q = mL, L:latent heat

Gokul43201
Gokul43201 is offline
#4
Jun10-04, 11:42 AM
Emeritus
Sci Advisor
PF Gold
Gokul43201's Avatar
P: 11,154

Heat of Fusion Lab Help needed


The specific heat of (ethyl) alcohol is 2.45 J/gC. (Other alcohols may be different.)


Register to reply

Related Discussions
Specific heat and latent heat of fusion Introductory Physics Homework 2
specific heat capacity and latent heat of fusion Introductory Physics Homework 4