A 400-gram sample of alcohol at 15 degrees celsius is mixed with 400 grams of water at 86 degrees Celsius.

What is the final temperature of the mixture?

Please examine this link:

http://www.chemteam.info/Thermochem/Mixi…

for a discussion of the technique to follow. Problem #6, which uses ethanol and water, is probably most like your problem.

Your problem uses alcohol, of which there are many types. I advise using ethanol and then explaining to your teacher that the word alcohol is general and the word ethanol is specific.

(Mass of alcohol) times (Constant pressure heat capacity of alcohol) times (the change in alcohol temperature) = (Mass of water) times (Constant pressure heat capacity of water) times (the change in water temperature)

You will have to assume an alcohol (Probably ethanol)

M1*Cp1*(Tf-Ti1)=M2*Cp2*(Tf-Ti2)

Solve for Tf (Which means T final)


P.S. The guy at the top = SUPER FAIL

This is basic Thermodynamics

Since the masses of the two substances are the same. the final temp will be (86 + 15)/2