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
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)?
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.