Saturday
April 18, 2015

Homework Help: college physics

Posted by cat on Monday, December 3, 2012 at 2:26pm.

An aluminum cup contains 225 g of water and a 40-g copper stirrer, all at 27C. A 400-g sample of silver at an initial temperature of 87C is placed in the water. The stirrer is used to stir the mixture gently until it reaches its final equilibrium temperature of 32C. Calculate the mass of the aluminum cup. answer in g

my equation looked like this:

(1/900)[400 g x 225 g x (87-32/32-27) - (40 g x 387 g) - 225]
I honestly don't think my numbers are right. My answer was 85 g, and the homework says that I am within 10% of the correct answer though...help please!

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

physics - A 50g ice cube is added to 110g of water in a 62g aluminum cup. The ...
chemistry - A sample of gold is at a initial temperature of 350 k. Once dropped ...
chemistry - A sample of gold is at a initial temperature of 350 k. Once dropped ...
physics - A 100 g aluminum calorimeter contains 250 g of water. The two ...
Physics - 19) A 100-g aluminum calorimeter contains 250g of water. The two ...
Physics - In a physics experiment, 250g of water is placed in a 50g calorimeter ...
Physics - In a physics experiment, 250g of water is placed in a 50g calorimeter ...
Chemistry - a coffee cup calorimeter normally consists of two nested styrofoam ...
physics - What will be the equilibrium temperature when a 273 g block of copper ...
physics - What will be the equilibrium temperature when a 245-g block of copper ...

Members