Identify the effect of the condition on the indicated parameter. Write increase, decrease, or no effect , and provide an explanation (3 sentences maximum). A wet pipette was used to transfer 10.00 mL of 1M HNO3 in the determination of ΔHrxn. [magnitude of ΔHrxn] The thermometer and stopper were inserted to the test tube 5 minutes after adding the base in the calibration part. [Ccal]

Identify the effect of the condition on the indicated parameter. Write increase, decrease, or no effect , and provide an explanation (3 sentences maximum). A wet pipette was used to transfer 10.00 mL of 1M HNO3 in the determination of ΔHrxn. [magnitude of ΔHrxn] The thermometer and stopper were inserted to the test tube 5 minutes after adding the base in the calibration part. [Ccal]

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter16: Thermodynamics: Directionality Of Chemical Reactions

Section: Chapter Questions

Problem 115QRT

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Recall that the formula for ΔHrxn = [(-Ccal)(moles of limiting reactant)/(ΔT)]If the actual concentration of the sodium hydroxide used in the calibration part of the experiment was lower than the stated value, will the value of Ccal increase, decrease, or remain the same? Please explain. How about if the actual concentration of the sodium hydroxide used in the calibration part of the experiment was lower than the stated value. However, the NaOH solution used in the determination of ΔHrxn was of the correct concentration. Will the magnitue of ΔHrxn increase, decrease, or remain the same? Please explain.
Identify the effect of the condition on the parameters. Write increase, decrease, or no effect. And Explain. A. The test tube used in the determination of the ΔHrxn for nitric acid was still wet with water. [ magnitude of ΔHrxn] B. The thermometer and stopper were inserted to the test tube 5 minutes after adding the base in the calibration part. [Ccal]
Identify the effect of the condition on the indicated parameter. Write increase, decrease, or no effect , and provide an explanation The actual concentration of the sodium hydroxide used in the calibration part of the experiment was lower than the stated value. However, the NaOH solution used in the determination of ΔHrxn was of the correct concentration. [magnitude of ΔHrxn]
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Identify the effect of the condition on the indicated parameter. 1. A wet pipette was used to transfer 10.00 mL of 1M HNO3 in the determination of ΔHrxn. [magnitude of ΔHrxn] a. Increase b. Decrease c. No Effect 2. The thermometer and stopper were inserted to the test tube 5 minutes after adding the base in the calibration part. [Ccal] a. Increase b. Decrease c. No Effect *Please provide a concise explanation.
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The value of K₂ for nitrous acid (HNO2) at 25 °C is 4.5 x 10-4. Part D What is the value of AG when [H+] = 5.5 x 10-2M, [NO₂] = 6.4 x 10-4M and [HNO₂] = 0.19 M? Express your answer using three significant figure. AG= Submit IVE| ΑΣΦ Request Answer ? kJ
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A newly made Styrofoam ball calorimeter was first calibrated by mixing 10.0 mL of 0.40 M hydrochloric acid and 0.1008 g magnesium oxide (MW = 40.30 g/mol; specific heat = 0.276 kJ/g°C). The reaction enthalpy (ΔHrxn) of HCl and MgO is -139.6 kJ/mol. The temperature change was recorded to be 5.5 °C. After calibration, the calorimeter was used to determine the reaction enthalpy of nitric acid and potassium hydroxide by mixing 5.0 mL of 0.40 M HNO3 and 5.0 mL of 0.80 M KOH. The temperature change was recorded to be 1.0 °C. What is the corrected heat capacity of the calorimeter?
Esc ||| = OTHERMOCHEMISTRY A student runs two experiments with a constant-volume "bomb" calorimeter containing 1200. g of water (see sketch at right). Calculating heat of reaction from bomb calorimetry data First, a 5.000 g tablet of benzoic acid (C6H,CO₂H) is put into the "bomb" and burned completely in an excess of oxygen. (Benzoic acid is known to have a heat of combustion of 26.454 kJ/g.) The temperature of the water is observed to rise from 16.00 °C to 38.96 °C over a time of 9.2 minutes. 2 4. Next, 5.730 g of acetaldehyde (C₂H₂O) are put into the "bomb" and similarly completely burned in an excess of oxygen. This time the temperature of the water rises from 16.00 °C to 42.19 °C. 84°F Sunny Use this information, and any other information you need from the ALEKS Data resource, to answer the questions below about this reaction: FI Explanation Is this reaction exothermic, endothermic, or neither? 4- F₂ Check 2C₂H4O(g) + 50₂(g) 4CO₂(g) + 4H₂O(g) Be sure any of your answers that are…
A newly made Styrofoam ball calorimeter was first calibrated by mixing 10.0 mL of 0.40 M hydrochloric acid and 0.1008 g magnesium oxide (MW = 40.30 g/mol; specific heat = 0.276 kJ/g°C). The reaction enthalpy (ΔHrxn) of HCl and MgO is -139.6 kJ/mol. The temperature change was recorded to be 5.5 °C. After calibration, the calorimeter was used to determine the reaction enthalpy of nitric acid and potassium hydroxide by mixing 5.0 mL of 0.40 M HNO3 and 5.0 mL of 0.80 M KOH. The temperature change was recorded to be 1.0 °C. What is the limiting reactant in the determination of the reaction enthalpy? What is the enthalpy of the reaction between nitric acid and potassium hydroxide? (in kJ/mol)