# chemistry

posted by .

9.) 250.0g of copper at 100.0 degrees C are placed in a cup containing 325.0g of water at 20.0 degrees C. Assume no less to the surroundings. What is the final temperature of the copper and water?

So far I have used q=mc times delta t but I cannot find C which is the specific heat and therefore my formula isnt appearing right. Also after I do this, how would I implement the numbers so that I will get it for one gram, the temperature. I am a bit confused. THanks for your help.

• chemistry -

loss of heat by copper + gain of heat by water = 0
massCu x specificheatCu x (Tf-Ti) + massH2O x specific heat water x (Tf-Ti) = 0
mass Cu = 250.0 g
sp. h. Cu = 0.385 J/g*C in my table.
Tf = final T Cu --solve for this
Ti Cu = 100 C.

mass H2O = 325.0 g
sp.h. H2O = 4.184 J/g*C
Tf = final T H2O --solve for this (note final T for Cu and final T for H2O is the same therefore there is only one unknown).
Ti H2O = 20.0 C.

You have only one unknown; i.e., Tf.

## Similar Questions

1. ### Chemistry

a coffee cup calorimeter normally consists of two nested styrofoam cups with a lid. a coffee cup calorimeter of this type contains 125.0 g of water at 20.00 degrees C. A 120.0 g sample of copper metal is heated to 98.0 degrees C by …
2. ### Chemistry

A piece of copper metal is initially at 100 C. It is dropped into a coffee cup calorimeter containing 50.0 g of water at a temperature of 20 C. After stirring, the final temperature of both copper and water is 25 C Assuming no heat …
3. ### Chemistry

A piece of copper metal is initially at 100 C. It is dropped into a coffee cup calorimeter containing 50.0 g of water at a temperature of 20 C. After stirring, the final temperature of both copper and water is 25 C Assuming no heat …
4. ### Chemistry

A piece of copper metal is initially at 100 C. It is dropped into a coffee cup calorimeter containing 50.0 g of water at a temperature of 20 C. After stirring, the final temperature of both copper and water is 25 C Assuming no heat …
5. ### Chemistry

A piece of copper metal is initially at 100 C. It is dropped into a coffee cup calorimeter containing 50.0 g of water at a temperature of 20 C. After stirring, the final temperature of both copper and water is 25 C Assuming no heat …
6. ### Chem 103

a piece of gold is heated to 100 degrees celsius. A piece of copper is chilled in an ice bath to 0 degrees celsius. Both pieces of metal are placed in a beaker containing 150 g of water at 20 degrees celcius. Will the temperature of …
7. ### physical

Specific Heat. Copper has a specific heat of 0.092 cal/g/deg C. A 75 gram copper mass has been heated to a temperature of 100 degrees C. The copper is placed in thermal contact with 50 grams of water at 25 degrees C. What will be the …
8. ### Chemistry

In chemistry, we did a lab in which we had a certain mass of copper, performed multiple experiments on the copper, and at the end, extracted the copper from a solution and weighed it. The goal was that the mass of the final copper …
9. ### chemISTRY

A hot lump of 33.2 g of copper at an initial temperature of 70.5 °C is placed in 50.0 mL of H2O initially at 25.0 °C and allowed to reach thermal equilibrium. What is the final temperature of the copper and water given that the specific …
10. ### chemistry

A hot lump of 46.9 g of copper at an initial temperature of 54.5 Ã‚Â°C is placed in 50.0 mL of H2O initially at 25.0 Ã‚Â°C and allowed to reach thermal equilibrium. What is the final temperature of the copper and water given …

More Similar Questions