IM LLI Calculate the standard enthalpy of reaction, AHn, of each of the given acid-base neutralization reactions involving the strong UXI base KOH. The standard enthalpy of formation data are provided. Compound or Ion Standard Enthalpy of Formation (kJ/mol) KOH(aq) -482.4 -285.8 (DO’H -98.4 KCIO,(aq) (be) OIDH -349.5 -121.0 (be)1 KBr(aq) -372.1 NH† (aq) -132.5 -80.3 NH, (aq) K*(aq) -251.2 HCIO, (aq)+KOH(aq) KCIO, (aq) + H,O(1) kJ/mol AHxn %3D = UXHV HBr(aq)+KOH(aq) → KBr(aq) + H,O(1) MacBook Pro Q Search or enter website name & delete $ 7. 081 5. 3. 4. P. R. K H. B. gE command option MOSISO R HBr(aq)+KOH(aq)→ KBr(aq) + H,O(1) %3D = "HV kJ/mol NH† (aq)+KOH(aq) NH, (aq) + K*(aq) + H,O(1) AH: Ixn %3D kJ/mol Based on theAHixn values, what is the most likely conclusion about the strength of the acids? O HCIO, (aq), HBr(aq), and NH (aq) are all strong acids. O HCIO, (aq), HBr(aq), and NH (aq) are all weak acids. O HCIO, (aq) and HBr(aq) are strong acids, and NH (aq) is a weak acid. O HC1O, (aq) and HBr(aq) are weak acids, and NH (aq) is a strong acid. MacBook Pro Q Search or enter website name 23 & 24 3. 4. 5. 6. 7. 00 6. dele P. H. K. 15 M B. gE MOSISO command uondo

IM LLI Calculate the standard enthalpy of reaction, AHn, of each of the given acid-base neutralization reactions involving the strong UXI base KOH. The standard enthalpy of formation data are provided. Compound or Ion Standard Enthalpy of Formation (kJ/mol) KOH(aq) -482.4 -285.8 (DO’H -98.4 KCIO,(aq) (be) OIDH -349.5 -121.0 (be)1 KBr(aq) -372.1 NH† (aq) -132.5 -80.3 NH, (aq) K(aq) -251.2 HCIO, (aq)+KOH(aq) KCIO, (aq) + H,O(1) kJ/mol AHxn %3D = UXHV HBr(aq)+KOH(aq) → KBr(aq) + H,O(1) MacBook Pro Q Search or enter website name & delete $ 7. 081 5. 3. 4. P. R. K H. B. gE command option MOSISO R HBr(aq)+KOH(aq)→ KBr(aq) + H,O(1) %3D = "HV kJ/mol NH† (aq)+KOH(aq) NH, (aq) + K(aq) + H,O(1) AH: Ixn %3D kJ/mol Based on theAHixn values, what is the most likely conclusion about the strength of the acids? O HCIO, (aq), HBr(aq), and NH (aq) are all strong acids. O HCIO, (aq), HBr(aq), and NH (aq) are all weak acids. O HCIO, (aq) and HBr(aq) are strong acids, and NH (aq) is a weak acid. O HC1O, (aq) and HBr(aq) are weak acids, and NH (aq) is a strong acid. MacBook Pro Q Search or enter website name 23 & 24 3. 4. 5. 6. 7. 00 6. dele P. H. K. 15 M B. gE MOSISO command uondo

Chemistry: An Atoms First Approach

2nd Edition

ISBN:9781305079243

Author:Steven S. Zumdahl, Susan A. Zumdahl

Publisher:Steven S. Zumdahl, Susan A. Zumdahl

Chapter7: Chemical Energy

Section: Chapter Questions

Problem 76E: Write reactions for which the enthalpy change will be a. Hf for solid aluminum oxide. b. the...

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When one mol of KOH is neutralized by sulfuric acid, q=56 kJ. (This is called the heat of neutralization.) At 23.7C, 25.0 mL of 0.475 M H2SO4 is neutralized by 0.613 M KOH in a coffee-cup calorimeter. Assume that the specific heat of all solutions is 4.18J/gC, that the density of all solutions is 1.00 g/mL, and that volumes are additive. (a) How many mL of KOH is required to neutralize H2SO4? (b) What is the final temperature of the solution?
Although the gas used in an oxyacetylene torch (Figure 5.7) is essentially pure acetylene, the heat produced by combustion of one mole of acetylene in such a torch is likely not equal to the enthalpy of combustion of acetylene listed in Table 5.2. Considering the conditions for which the tabulated data are reported, suggest an explanation.
ou place hot metal into a beaker of cold water. ol type='a'> Eventually what is true about the temperature of the metal compared to that of the water? Explain why this is true. i>Label this process as endothermic or exothermic if we consider the system to be the metal. Explain. the water. Explain.
Write reactions for which the enthalpy change will be a. Hf for solid aluminum oxide. b. the standard enthalpy of combustion of liquid ethanol, C2H5OH(l). c. the standard enthalpy of neutralization of sodium hydroxide solution by hydrochloric acid. d. Hf for gaseous vinyl chloride, C2H3Cl(g). e. the enthalpy of combustion of liquid benzene, C6H6(l). f. the enthalpy of solution of solid ammonium bromide.
A piece of lead of mass 121.6 g was heated by an electrical coil. From the resistance of the coil, the current, and the Time the current flowed, it was calculated that 235 J of heat was added to the lead. The temperature of the lead rose from 20.4C to 35.5C. What is the specific heat of the lead?
What is the enthalpy of formation (AH°;) of NaHCO3(s) from its constituent elements?
1. You have calculated the AH for the formation of ammonium chloride from your experimental data HCI + NH3 → NHẠCI Using the literature values provided below, calculate the theoretical AH for this reaction. AH,° HCl(ag) = -167.159 kJ/mole AH,° NH3(aq) = -80.835 kJ/mole AH,° NHẠC1(aq) = -299.66 kJ/mole %3D
ered You want to determine the enthalpy change for the neutralization of HCI(aq). The equipment you are allowed to use are listed below: • safety goggles tion • lab coat • protective gloves • coffee cups (2) • styrofoam lid • thermometer • scale • stirring rod • beaker 16-ml of 0.345 mol/L HCI(a) added to 42.6-ml of NaOH (aq) for a total volume which is equivalent to water (m) in the q equation a. Based on the equipment provided above, design a lab to determine the enthalpy change of neutralization of HCI(aq). Ensure you use numbered steps. When you carry out the experiment, you observe a temperature change of 3.80°C. b. Calculate the quantity of heat transferred to the calorimeter based upon the data provided. c. Based upon the data provided, calculate the molar enthalpy for the neutralization of HCI(aq). d. If the mass of volume of the HCl(aq) was increased, would the value of Q be different. Explain your reasoning. e. Provide a thorough concluding statement that includes the…
The molar enthalpy of solid sodium hydroxide with a solution of hydrochloric acid. NaOH(s) + HCI(aq) - NaCI(aq) + H,O(1) Hneor. kJ/mol
When 0.776g of sodium metal is added to an excess of hydrochloric acid, 8070 J of heat are produced. What is the enthalpy of the reaction as written? 2Na(s) +2HCI(aq) --->2NaCl+H2(g) Enthalpy of reacyion in kJ ?
2 (a) In this investigation, you will use a polystyrene-cup calorimter to determine the amount of heat released during acid-base neutralization reactions. Find information in your textbook, an encyclopedia, or a web site about calorimetry. Sketch the apparatus for a polystrene-cup calorimeter. (b) For more precise heat of reaction measurnments, chemists use a device called bomb calorimeter. How is a bomb calorimeter similar to and different from a polystyrene-cup calorimeter?
Calculte the standard enthalpy change, A;Hº for the reaction.

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