Homework Answers
a. The heat of neutralisation is directly proportional to
T. Therefore if
Tis smaller than true value, heta of neutralisation will be
lower.
b. The heat relesed = heat absorbed by water + heat absorbed by calorimeter. If we neglect the second term in this equation, we see that the value of heat of neutralisation will be lower
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4. How would your calculated value of the heat of neutralization be affected by the following...
How would your Calculated Value Of The Heat Of Solution Be Affected By The Following Mistakes ? a. Spilling Some Salt On...
How would your Calculated Value Of The Heat Of Solution Be Affected By The Following Mistakes ? a. Spilling Some Salt On The Benchtop While Transferring It To The Caliorimeter, And Being Unable To Sweep All Of It Up And Into The Calorimeter. b. Having a Salt That Does Not Completely Dissolve In The Reaction Mixture. c. Reducing the volume of liquid in the calorimeter to 80.0 mL, and correctly accounting for this in calculation.
A a. After having completed your experiment and calculated your Enthalpy of Neutralization, e usu-you are...
A a. After having completed your experiment and calculated your Enthalpy of Neutralization, e usu-you are told concentration of the NaOH solution you used was 5% less than indicated on its label and asked to recalculate your enthalpy of neutralization. Will the recalculated cment value be larger, smaller, or the same as you originally calculated? b. Now consider the HCl you used in your experiment, if the concentration was 5% higher than that stated on its label, what will be...
29 NEUTRALİZATION CALORIMETRY 3-THERMODYNAMICS: ENTHALPY OF EXERCISES 1. If the final te or eratu...
29 NEUTRALİZATION CALORIMETRY 3-THERMODYNAMICS: ENTHALPY OF EXERCISES 1. If the final te or erature taken in part I was higher than the true value, the calculated value for the heat capacity of the lower than the true value? calorimeter be higher than in the process of transferring the metal cylinder from the hot water to the in part II, the cylinder lost some heat, would the calculated value 2. If for the specific heat of the metal be higher or...
Explain what effect the following scenarios would have on the calculated specific heat (i.e. would it...
Explain what effect the following scenarios would have on the calculated specific heat (i.e. would it be calculated artificially high, low, or have no effect). Your explanation should address what variable(s) would be affected by the scenario and how that affects the calculation of specific heat.(1.5pt each) A student accidently dropped the piece of metal on the countertop during the process of transferring it from the boiling water bath to the calorimeter, but was quickly picked up and put into...
E AFTER COMPLETING LAB. ANSWER IN SPACE PROVIDED. Suppose the heat of neutralization had been determined using a glass beaker instead of a polystyrene coffee cup How would the measured value have...
E AFTER COMPLETING LAB. ANSWER IN SPACE PROVIDED. Suppose the heat of neutralization had been determined using a glass beaker instead of a polystyrene coffee cup How would the measured value have been affected? The heat of combustion of octane, C,H,. can be measured in a way similar to the method youC used to measure the heat of neutralization. The bomb calorimeter is used instead of a coffee cup. The reaction is 2C,H,1)+ 25 O, (g) 16 CO, (g) +...
3) You would like to measure the heat of neutralization of an acid with a base....
3) You would like to measure the heat of neutralization of an acid with a base. You mix 225 mL each of 0.65 M HNO, and 0.65 M LiOH, both at a temperature of 18.1 °C in a calorimeter cup equilibrated to that same temperature. After following the temperature change for 10 min and extrapolating it back to the time of addition, you find that the "final temperature" after mixing was 22.3 °C. Previously, you measured the heat capacity of...
How would your calculated value for the molecular weight of your unknown been affected (high, low,...
How would your calculated value for the molecular weight of your unknown been affected (high, low, no effect) if a small quantity of the unknown stuck to the metal stirring rod and failed to dissolve in the benzophenone?
explain how would the calculated value of molar mass be affected if the temperature was assumed...
explain how would the calculated value of molar mass be
affected if the temperature was assumed to be 100 when it was
actually was only 90 Celcius
Experiment 8 Questions. 1. Explain how would the calculated value of the molar mass be affected (too high, too low, no effect) if: a) the flask had been left in the water bath for so long that after all the liquid vaporized, some of the vapor escaped and was replaced by air? less...
A calorimetry investigation is performed to determine the heat of neutralization when hydrochloric acid and sodium...
A calorimetry investigation is performed to determine the heat of neutralization when hydrochloric acid and sodium hydroxide solutions are mixed. Write the complete chemical equation for the reaction between hydrochloric acid and sodium hydroxide. Write the net ionic equation for the reaction between hydrochloric acid and sodium hydroxide. The procedure then calls for measuring 50.00 mL of each 0.10 molar solution. Why is it important to measure the volumes as accurately as possible? What is the most accurate measuring instrument...
moles of h3o neutralized with oh and heat of neutralization per mole of h3o neutralized Lab...
moles of h3o neutralized with oh and heat of neutralization
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Lab 6 Chemistry 117 University of Massachusetts Boston Part 2: Heat of Neutralization Data a. Exact volume of 1.00 M HCl(aq) (-50 mL) b. Exact volume of 1.00 M NaOH(aq) to be added (30-40 mL) c. Moles of NaOH d. Assuming 1.00 mL = 1.00 g, mass of solution produced on mixing e. Heat capacity of calorimeter, Coal f. Initial temperature, Ti g. Final temperature,...
A a. After having completed your experiment and calculated your Enthalpy of Neutralization, e usu-you are told concentration of the NaOH solution you used was 5% less than indicated on its label and asked to recalculate your enthalpy of neutralization. Will the recalculated cment value be larger, smaller, or the same as you originally calculated? b. Now consider the HCl you used in your experiment, if the concentration was 5% higher than that stated on its label, what will be...
29 NEUTRALİZATION CALORIMETRY 3-THERMODYNAMICS: ENTHALPY OF EXERCISES 1. If the final te or erature taken in part I was higher than the true value, the calculated value for the heat capacity of the lower than the true value? calorimeter be higher than in the process of transferring the metal cylinder from the hot water to the in part II, the cylinder lost some heat, would the calculated value 2. If for the specific heat of the metal be higher or...
E AFTER COMPLETING LAB. ANSWER IN SPACE PROVIDED. Suppose the heat of neutralization had been determined using a glass beaker instead of a polystyrene coffee cup How would the measured value have been affected? The heat of combustion of octane, C,H,. can be measured in a way similar to the method youC used to measure the heat of neutralization. The bomb calorimeter is used instead of a coffee cup. The reaction is 2C,H,1)+ 25 O, (g) 16 CO, (g) +...
3) You would like to measure the heat of neutralization of an acid with a base. You mix 225 mL each of 0.65 M HNO, and 0.65 M LiOH, both at a temperature of 18.1 °C in a calorimeter cup equilibrated to that same temperature. After following the temperature change for 10 min and extrapolating it back to the time of addition, you find that the "final temperature" after mixing was 22.3 °C. Previously, you measured the heat capacity of...
explain how would the calculated value of molar mass be
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actually was only 90 Celcius
Experiment 8 Questions. 1. Explain how would the calculated value of the molar mass be affected (too high, too low, no effect) if: a) the flask had been left in the water bath for so long that after all the liquid vaporized, some of the vapor escaped and was replaced by air? less...
moles of h3o neutralized with oh and heat of neutralization
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Lab 6 Chemistry 117 University of Massachusetts Boston Part 2: Heat of Neutralization Data a. Exact volume of 1.00 M HCl(aq) (-50 mL) b. Exact volume of 1.00 M NaOH(aq) to be added (30-40 mL) c. Moles of NaOH d. Assuming 1.00 mL = 1.00 g, mass of solution produced on mixing e. Heat capacity of calorimeter, Coal f. Initial temperature, Ti g. Final temperature,...
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