CHEMMMMM!
Specific Heat Experiment
Vicki Jones
Partner: Omar Purpuro
Period: 6/7
Due: November 21,2006
Purpose: To find the specific heats of a solid substance. To compare the measured value to known value with percent error calculations. To work on math skills usuing significant figures in calculations.
Procedure:
1. Measure the mass of the cup in the calorimeter.
2. Add 230mL water.
3. Measure the mass of the water.
4. Take the temperature of the water in the calorimeter and measure to the tenths.
5. Measure the mass of the solid.
6. Heat the solid in boiling water for five minutes so that the solid is the same temperature as the boiling water.
7. Take the temperature of the boiling water.
8. Remove the solid from the boiling water and quickly place it into the calorimeter.
9. Record the temperature of the water every 30 seconds.
10. After you get the same temperature of the water three times in a row, you are finished taking the temperature.
Data: See attached.
Calculations: See attached.
Equations: q = m c ΔT
ΔT = Tf - Ti
Questions:
celsius
1. Yes, I think the values for the specific heat of the aluminum used by other lab teams will be the same as mine because all of the aluminum has the same density value.
2. The lab unit for heat is q = m c ΔT.
The lab unit for temperature is ΔT = Tf - Ti.
3. My measured value of aluminum was .27 cal/g degrees celsius. My percent error for this experiment was 29 percent. I think this says that my measurements of the temperature of the aluminum was off making my data and calculations wrong.
.27-.21/.21 x 100 = 28.5 = 29 % error
4.
Conlcusions:
Vicki Jones
Partner: Omar Purpuro
Period: 6/7
Due: November 21,2006
Purpose: To find the specific heats of a solid substance. To compare the measured value to known value with percent error calculations. To work on math skills usuing significant figures in calculations.
Procedure:
1. Measure the mass of the cup in the calorimeter.
2. Add 230mL water.
3. Measure the mass of the water.
4. Take the temperature of the water in the calorimeter and measure to the tenths.
5. Measure the mass of the solid.
6. Heat the solid in boiling water for five minutes so that the solid is the same temperature as the boiling water.
7. Take the temperature of the boiling water.
8. Remove the solid from the boiling water and quickly place it into the calorimeter.
9. Record the temperature of the water every 30 seconds.
10. After you get the same temperature of the water three times in a row, you are finished taking the temperature.
Data: See attached.
Calculations: See attached.
Equations: q = m c ΔT
ΔT = Tf - Ti
Questions:
celsius
1. Yes, I think the values for the specific heat of the aluminum used by other lab teams will be the same as mine because all of the aluminum has the same density value.
2. The lab unit for heat is q = m c ΔT.
The lab unit for temperature is ΔT = Tf - Ti.
3. My measured value of aluminum was .27 cal/g degrees celsius. My percent error for this experiment was 29 percent. I think this says that my measurements of the temperature of the aluminum was off making my data and calculations wrong.
.27-.21/.21 x 100 = 28.5 = 29 % error
4.
Conlcusions: