Homework Help: chemistry f/u

Posted by Ben on Sunday, September 4, 2011 at 4:50pm.

Thank you Mr. bobpursley. I am still unclear on a few things.
massethanol*Ceth(Tf-7.7)+masswater*Cwater*(Tf-27.1)=0
solve for Tf

17.75g ethanol x(Tf-7.7)+31.6g water x (Tf-27.1)=0

This is the algebra that I do not know how to derive to move to the next step. Do I add it all to the other side of the equation or do I divide by everything on the left except for Tf?

Thanks again

chemistry f/u - bobpursley, Sunday, September 4, 2011 at 4:55pm
This is pretty basic algebra.

Tf[17.75*Ceth +31.6*Cwater] -17.7(Ceth)(7.7) - 31`.6*Cwat*27.1=0

check that.

then add the last two terms to both sides.

Then, divide both sides by the quantity in [].

If you really can't do this level of algebra, you need a math tutor now, or chemistry will increasingly grow onerous.

Math is the language for chemicalreactions.

Answer this Question

Related Questions

college physics - using the quadratic equation on a 2 dimensional projectile ...
Chemistry - Final Temperature - An unknown mass of each of the following ...
Chemistry - This is sort of like the one I last posted, only it asks for the ...
chemistry - Is delta Tf = delta Tb? The original practice problem is Detla Tf= 8...
thermochemistry - what is the mass of a lead block that if heated to 100.0 dgrs ...
Chemistry - 1) The molecular mass of a substance was determined by the freezing ...
Physics Please someone help please - A 34 g glass thermometer reads 21.6°C ...
Physics - what would be the final temperature when 80kg of 0 degrees C cold ...
Physics - An ice chest at a beach party contains 12 cans of soda at 3.05 °C...
chemistry - The molecular mass of a substance was determined by the freezing ...

For Further Reading

First Name:
School Subject:
Answer: