NAME________

 

HEAT LAB 05:

PART ONE

PREDICT THE TEMPERATURE!!

Take an amount of Hot Water and half the amount of Cold Water.

Predict what you think the final temperature will be!

Mix Them!

OBJECT

MASS

StartingTemp

Final Temp

SpecificHeat

Hot Water

 

 

 

4187 J/kg/°C

Cold Water

 

 

 

4187 J/kg/°C

 

How much heat did the Hot Water lose?

         ΔQ = mCΔT

How much heat did the Cold Water gain?

         ΔQ=mCΔT

 

Are these the same? Should they be? What should’ve the final temperature been? What is your percent error? Why? Explain what happened in terms of the molecules and heat transfer.

 


 

PART TWO:

 

Determine the specific heat of aluminum!

 

Place an amount of HOT water in an aluminum calorimeter, along with an amount of an ice cube. When the ice melts, determine the final temperature and the specific heat of the calorimeter.

 

 

OBJECT

MASS

START TEMP

FINAL TEMP

SPECIFIC HEAT

Heat of Fusion

Al Cup

 

 

 

??

XXXXX

Water

 

 

 

4187 J/kg/°C

XXXX

ICE

 

0 °C

 

2090 J/kg/°C

3,335,000 J/kg

 

 

How much energy did the hot water lose?

 

 

How much energy did the ice gain by melting?

 

 

How much energy did the ice gain by heating up (as water)?

 

How much energy must’ve the Al cup gained?

 

 

What is the specific heat of Al according to your lab?

 

 

How does this compare with the real specific heat?

 

 

What is your percent error?

 

 

Why?

 

Explain what happened in terms of the molecules and heat transfer.