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Using your understanding of this lab and information in your lab notebook, answer the following questions in the space provided.
1. Write in the blank one of your temperatures that you recorded in this lab, _________________° C .
2. Did you observe directly the mass of the water, Yes or No. If yes, write down "Yes" and then write down the value of the water's mass in the space below. If not, write down "No" and then write down what observation you did observe directly so that you can calculate the mass of the water.
___________________________________________________________________
3. If you inadvertently dropped some of the wax before you weighed the candle after burning it, how would it change the experimental value of the Heat of Combustion of Candle Wax? Circle correct answer below.
a. Incorrect value ( of Heat of Combustion of Candle Wax) will be LESS than experiment value that did not loss wax
b. Incorrect value ( of Heat of Combustion of Candle Wax) will be GREATER than experiment value that did not loss wax
c. Would not have an effect on experimental value of the Heat of Combustion of Candle Wax.
d. Do not have enough information to answer question.
4. Which substance released the energy as the reaction occurred? (Circle answer)
a. Candle Wax b. Water c. Air (around candle & can) d. Index card that candle was placed on.
5. Looking at your equations for Absolute error and percent error, what does a negative percent error mean?
6a. What was the big assumption (that most likely caused the greatest error) in the lab? _______________________________
6b. Explain why raising the temperature of the water as far above room temperature as it started below room temperature would reduce the error in the lab (see question 6a)?