Upon heating, baking soda decomposes as follows, creating the holes in baked bread: 2NaHCO, (s) Na,CO, (s) + CO,(g) + H,0(1) 9th attempt See Periodic Table O See Hint When 27.0 g NaHCO3 decomposes, the change in energy is-20.8 kJ. Use this information and the additional information provided to calculate the AH; of NaHCO3. Substance AH÷ (kJ/mol) H20() -286 CO2(g) -394 Na,CO3(s) -1131 AH°; of NaHCO3 kJ/mol

Upon heating, baking soda decomposes as follows, creating the holes in baked bread: 2NaHCO, (s) Na,CO, (s) + CO,(g) + H,0(1) 9th attempt See Periodic Table O See Hint When 27.0 g NaHCO3 decomposes, the change in energy is-20.8 kJ. Use this information and the additional information provided to calculate the AH; of NaHCO3. Substance AH÷ (kJ/mol) H20() -286 CO2(g) -394 Na,CO3(s) -1131 AH°; of NaHCO3 kJ/mol

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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When 1 mole of Fe₂O3(s) reacts with Al(s) to form Al₂O3(s) and Fe(s) according to the following equation, 852 kJ of energy are evolved. Fe₂O3(s) + 2Al(s)—Al₂O3(s) + 2Fe(s) Is this reaction endothermic or exothermic? | What is the value of q? kj
1) The efficiency of a GC separation of 2-butanone on a dinonyl phthalate packed column was studied. Evaluating plate height as a function of flow rate gave a van Deemter equation for which A is 1.65 mm, B is 25.8 mm•mL min–1, and C is 0.0236 mm•min mL–1. a) Prepare a graph of H versus u for flow rates between 5 –120 mL/min. b)For what range of flow rates does each term in the Van Deemter equation have the greatest effect? c)What is the optimum flow rate and the corresponding height of a theoretical plate?
Reaction 2 How much energy (in kJ) is released when 54,0 g of oxygen difluoride decomposes? Enter a positive number, Round to the nearest hundredth
How many kilojoules of energy are generated when in 82.8 grams of CO(9) reacts according to the following reaction? CO(g) + O2 (9) –→ CO2(g) Hint: balance the reaction first on Answer in decimal form with 1 decimal place Compound H; (KJ/mol) Compound H;(KJ/mol) CH.(9) * CO2(9) SO2(9) NH,C(s) HC(g) H,O(g) H2O(1) -75.7 -93.2 -394.4 -242.7 -297 -286.7 H2S(g) 89.5 H2 SO,(1) 33 M9SO4(s) -316.3 -21 NO(9) NO2(9) SnCl4 (1) Sn0(s) SnO2(s) NaF(s) NaOH(s) NH3 (g) CO(9) -812.2 -1279 1 Mn0(s) -287.1 MnO2(s) -581.6 NaCl(s) SO3 (g) Zn0(s) ZnS(s) O2(9) -546.1 -385.8 -520.6 -411.9 -569.9 -396.1 -427.6 -348.9 -47.1 -203.8 -111.4
14. For the incomplete combustion of silicon: 2Si(s) + O:(g) → 2SIO(g) AH = -88.2 kJ calculate the amount of heat released for each of the following: (a) 5.00 mol of Si is reacted (b) 5.00 g of Si is reacted
Unit Name: Thermodynamic Chemistry investigate and analyse energy changes and rates of reaction in physical and chemical processes, and solve related problems; If 3.65g of butane is burned underneath a cup holding 1.00 L of water at 21.0oC, what will the final temperature of the water be (ΔHcomb = -3325 kJ/mol)?
How many kilojoules of energy are generated when in 82.8 grams of CO(g) reacts according to the following reaction? CO(g) + O2 (g) → CO2(9) Hint: balance the reaction first Answer in decimal form with 1 decimal place Compound H; (KJ/mol) Compound H;(KJ/mol) CH(9) HCl(g) H,0(g) H2O(1) H2 S(g) 89.5 H2SO,(1) 33 M9SO, (s) -75.7 -93.2 Co2(9) 394.4 -242.7 SO2 (g) NH,C(s) NO(g) NO,(g) -297 -286.7 -316.3 -21 -812.2 -1279.1 SnCl4 (1) Sn0(s) SnO2(s) NaF(s) NaOH(s) Mn0(s) :-287.1 MnO2(s) -581.6 NaCl(s) SO: (9) Zn0(s) ZnS(s) -546.1 -385.8 -520.0 -411.9 -569.9 -396.1 -427.6 -3489 NH3 (9) -47.1 -203.8 CO(g) -111.4 O2(9)
Using Hess's law, what is AHf rxn for the following reaction? NO(G) + O(g) – NO2(9) NO(g) + O3(9) – NO2(9) +O2(9) AH xn = -198.8 kJ/mol Og(9) – 3/2 02(9) AHrxn = -142.2 kJ/mol 02(9) → 20(9) AH Prxn = +498.8 kJ/mol -839.8 kJ/mol -306.0 kJ/mol 394.9 kJ/mol 157.9 kJ/mol O 442.3 kJ/mol QUESTION 8 Octane (C3H18) undergoes combustion according to the following thermochemical equation. 2C8H18() + 2502(g) – 16CO2(g) + 18H20() AH°rxn = -1.0940 x 104KJ/mol What is the standard enthalpy of formation of liquid octane? AH°{(CO2(g)) = -393.5 kJ/mol and AH°F{H2O(1)) = -285.8 kJ/mol 495 kl/mol O -250 kJ/mol -495 kJ/mol -10,940. kJ/mol -2188 kJ/mol
A 125 g piece of rock of unknown specific heat is heated to 93 degrees C. The rock is then dropped into 100 g of water at 19 degrees C. the water temperature rises to 31 degrees C. What is the specific heat of the rock? (3) O 0.65 J/(g °C) O 0.65 J O 0.71 J/g °C) O 1.14 J/g.
How many kilojoules of energy are generated when in 82.8 grams of CO(g) reacts according to the following reaction? CO(g) + O2 (g) –→ CO2(9) Hint: balance the reaction first Answer in decimal form with 1 decimal place Compound H;(KJ/mol) Compound H;(KJ/mol) HC(g) H,O(g) H2O(1) H,S(g) 89.5 H2SO4(1) 33 M9SO4(8) -546.1 Mn0(s) :-287.1 MnO2(s) NaCl(s) SO3 (g) ZnO(s) ZnS(s) O2(9) CH(9) -93.2 -75.7 -242.7 CO2(g) SO2 (9) NH,Cl(s) NO(g) -394.4 -297 -286.7 -316.3 -21 -812.2 -1279.1 NO2(g) SnCl4(1) Sn0(s) SnO2(s) NaF(s) NaOH(s) NH3 (9) CO(g) -385.8 -520.6 -581.6 -411.9 -569.9 -396 1 -427.6 -3469 -47.1 -203.8 -111.4
Be sure to answer all parts. A 0.6475-g sample of solid magnesium is burned in a constant-volume bomb calorimeter that has a heat capacity of 3024 J/°C. The temperature increases by 5.301°C. (a) Calculate the heat associated with the burning Mg in kJ/g. kJ/g (b) Calculate the heat associated with the burning of Mg in kJ/mol. kJ/mol