Concept explainers
(a)
Interpretation: Whether the given reaction is exothermic or endothermic should be determined.
Concept Introduction: The reaction which requires energy for the conversion of reactant to product is called as endothermic reaction whereas the reaction that releases some amount energy during the conversion of reactant to product is called as exothermic reaction.
(b)
Interpretation: The amount of energy in kilojoules required when 1.5 mol of SO3 reacts should be determined.
Concept Introduction: The reaction which requires energy for the conversion of reactant to product is called as endothermic reaction whereas the reaction that releases some amount energy during the conversion of reactant to product is called as exothermic reaction.
(c)
Interpretation: The amount of energy in kilojoules required when 150 g of O2 is formed should be determined.
Concept Introduction: The reaction which requires energy for the conversion of reactant to product is called as endothermic reaction whereas the reaction that releases some amount energy during the conversion of reactant to product is called as exothermic reaction.
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EP BASIC CHEMISTRY-STANDALONE ACCESS
- Part B Determine how many kilojoules are absorbed when 339 g of Ca(OH)2 reacts via the following reaction: Ca(OH)2 (s) CaO(s) + H20(1), AH=+65.3 k.J kJ Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining Provide Feedback P Type here to search a hparrow_forwardGiven the following data 2 CIF (g) + O₂(g) → Cl₂ O(g) + F₂O(g) 2 CIF3 (9) +202 (g) → Cl₂ O(g) + 3F₂O(g) 2F2 (g) + O₂(g) → 2F₂O(g) calculate A H for the reaction AH= CIF (g) + F2 (g) → CIF3 (9) Submit Answer kJ Try Another Version ΔΗ = 167.4 kJ Δ Η = 341.4 Κ Δ Η = -43,4 kJ item attempt remainingarrow_forwardCombustion reactions involve reacting a substance with oxygen. When compounds containing carbon and hydrogen are combusted, carbon dioxide and water are the products. Using the enthalpies of combustion for C₂ H₂ (-1300. kJ/mol), C2H6 (-1560. kJ/mol), and H₂ (-286 kJ/mol), calculate AH for the reaction ΔΗ = C₂H₂(g) + 2H₂(g) → C₂H6 (9) kJarrow_forward
- In a coffee-cup calorimeter, 110.0 mL of 1.2 M NaOH and 110.0 mL of 1.2 M HCl are mixed. Both solutions were originally at 22.5°C. After the reaction, the final temperature is 30.5°C. Assuming that all the solutions have a density of 1.0 g/cm³ and a specific heat capacity of 4.18 J/°C.g, calculate the enthalpy change for the neutralization of HCl by NaOH. Assume that no heat is lost to the surroundings or to the calorimeter. AH = 0.182 kJ/molarrow_forward7.2 heat of reaction from bomb Aleks takes significant figures very seriously. Thanksarrow_forward9.38 Classify each of the following as exothermic or endothermic, and give the AH for each: a. C3H8(g) + 502(g) A b. 2Na(s) + Cl2(g) → → c. PCl5(g) + 67 kJ 3CO2(g) + 4H2O(g) + 2220 kJ 2NaCl(s) + 819 kJ PC13(g) + Cl2(g)arrow_forward
- GO and O-H bonds are stronger than C-C and C-H bonds, because C-O bonds and O-H bonds e polar. The partial charges on the atoms result in stronger attraction between the atoms. This is why combustion reactions are exothermic and why fossil fuels are so valuable Which of the following reactions would you predict to be endothermic? a) 200 + 4H2 > CHạ + 02 b) 2H2(8) + Oz(8) → 2H;O(1) c) Na(s) + Chie) → 2NACI(s) d) paper burning to form CO; and H20 6) Consider the reaction CH3OH + HBr > CH,Br + H;0 Draw the Lewis structures for reactants and products. Which bonds are broken in this reaction? Which bonds are formed? Use the table below to determine if this reaction is exothermic or endothermic and the value for AH. Table 5.4 Average Bond Enthalpies (kJ/mol) C-H 413 N-H 391 0-H 463 155 C-C 348 N-N 163 0-0 146 614 N-O 201 495 d-F 253 C-N 293 N-F 272 0-F 190 C-a 242 C-O 358 N-C 200 2113 799 N-ir 24.1 0-1 234 lir- 237 C-F 485 218 C-a 328 H-H 436 Br-Br 193 C-Br 276 H-F 567 C-I 240 H-CI 431 208…arrow_forwardAccording to the given reactions, which of the following is not exothermic? SO2(g) – S(s) + O2(3) AH= +199 kJ/mol AH =+199 kJ/mol SO3(g) – S(3) + 3/2 02(g) AH=+195 kJ/mol so;(g) – SO2(e) + 1/2 02(g) OA. 2 S(s) + 2 02(g) -2 SO2(g) OB. 2 S(s) + 5/2 02(g) –→ SO2(g) + SO3(g) OC. 2502(g) – 2S(s) + 202(g) OD. 2 S(3) + 3 02(g) -2 SO3(g) OE.arrow_forwardGiven the following reaction, how much energy would be produced if 3.59 L of oxygen gas reacted with excess C2H5OH @ STP? C2H5OH (g) + 3 O2 (g) ⟶ 2 CO2 (g) + 3 H2O (l) ΔH = -1020 kJarrow_forward
- The metabolism of glucose (molar mass 180.2 g/mol) with oxygen forms CO, and H,0 and releases 678 kcal/mol of energy. 6 CO2(g) + 6 H,0(1) CGH1206(aq) + 6 O2(g) glucose a. Are the bonds formed in the products stronger or weaker than the bonds broken in the reactants? b. How much energy is released when 4.00 mol of glucose is metabolized? c. How much energy is released when 3.00 mol of O, reacts? d. How much energy is released when 10.0 g of glucose reacts?arrow_forwardI need an answer for this question. Thank you. #6arrow_forwardCombustion reactions involve reacting a substance with oxygen. When compounds containing carbon and hydrogen are combusted, carbon dioxide and water are the products. Using the enthalpies of combustion for C4H4 (– 2341 kJ/mol), C4H3 (- 2755 kJ/mol), and H2 (- 286 kJ/mol), calculate AH for the reaction. САНа (9) + 2 Нэ(9) —> C4H8 (9) ΔΗ kJarrow_forward
- Chemistry: Principles and PracticeChemistryISBN:9780534420123Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward MercerPublisher:Cengage Learning