3. Consider the following two reactions:                         A → 2B           ΔH0rxn = 456.7 kJ/mol                         A → C ΔH0rxn = -22.1kJ/mol Determine the enthalpy change for the process for 2B → C.

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A: Given, a) 4B (s) + 3 O2 (g) → 2 B2O3 (g) ΔrHº = -2544 kJ/mol b) H2 (g) + 1/2 O2 (g) → H2O (g) ΔrHº =…

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Q: consider the reaction: 4NH3(g)+5O2(g)⟶4NO(g)+6H2O(g)ΔrH∘=−906kJ/mol Calculate the energy released…

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Q: What is the change in internal energy of the system   (ΔU)  if   50 kJ   of heat energy is released…

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Q: 2. Write the thermochemical equation when one mole of nitrogen gas, N, reacts with one mole of…

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Q: Consider the dissolution of CaCl2: CaCl2 (s) → Ca²+ (ag) +2 Cl¯(ag) AH=-81,5 kJ An 11.8-g sample of…

A: When a solute is dissolved in solvent to form a solution is called dissolution. It measures the…

Q: Magnesium burns in air to produce a bright light and is often used in fireworks displays. The…

A: Given :-  2Mg(s) +O2(g) 2MgO(s)    ; ∆Ho = -1203 kJ  mass of Mg burns = 6.82 g  To calculate :-…

Q: 3. Using standard enthalpies of formation (∆Hfº), calculate the enthalpy change for the following…

A: For the reaction: 2H2S(g) + 3O2(g) → 2H2O(l) + 2SO2(g)                                 The standard…

Q: 4. A 5.00 gram sample of an unknown metal was placed in a beaker of boiling water (99.58 °C). After…

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Q: 9. A300g sample of an element at 115 °C is dropped into an ice water mixture; 110 g ice melts and an…

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Q: 7. For the following scenarios what is the metal? a. A piece of metal weighing 59.047 g was heated…

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Q: Use the following information to determine the enthalpy for the reaction shown below. CS2(l) +…

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Q: Magnesium metal reacts with HCl according to the following balanced equation: Mg(s)  +      2 HCl…

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Q: A chemist measures the energy change AH during the following rea 2 HgO(s)→ 2 Hg(1)+ O₂(g) Use the…

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Q: A chemist measures the energy change AH during the following reaction: 2 HgO(s) → 2 Hg(1) + O₂(g)…

A: The definition of an exothermic reaction is one in which the system (where the reaction is taking…

Q: Part D A1.6 kg block of iron at 28 °C is rapidly heated by a torch such that 18 kJ is transferred to…

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Q: Consider the following hypothetical reaction: A(g) + B(g) → D(g) AH° = 47.2 kJ Given that the…

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Q: A 2.62E1 g sample of aluminum at 1.008E2 °C is added to 1.002E2 g of water at 2.22E1 °C in a…

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Q: the following hypothetical reactions: A→BΔH=+18kJA→BΔH=+18kJ B→CΔH=+60kJB→CΔH=+60kJ       Use Hess's…

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Q: Methanol can be synthesized from graphite according to the following reaction, calculate the…

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Q: 92. Use standard enthalpies of formation to calculate AHin for each reaction. a. 2 H₂S(g) + 3 O₂(g)…

A: is given by:        Standard enthalpies of formation of the compounds given: H2S = -20.63 kJ/moleH2O…

Q: Determine the enthalpy of reaction for HCl(g) + NaNO₂(s) → HNO₂(l) + NaCl(s) 2NaCl(s) + H₂O(l) →…

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Q: Consider the hypothetical thermochemical equation 3 A + B → 2 C for which ΔH = 58.7 kJ/mol. If the…

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Q: When a system gives off 100J of heat and the surroundings does 50J of work on the system, what is…

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Q: You mix 125 mL of 0.230 M with 50.0 mL of 0.575 M in a coffee-cup calorimeter, and the temperature…

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Q: Calcium hydroxide is prepared by adding calcium oxide to water: CaO (s) + H2O (l) → Ca(OH)2 (s)…

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Q: In the following experiment, a coffee-cup calorimeter containing 100 g of H20 is used. The initial…

A: Determination of heat released by dissolution of CaCl2 as; Heat released by dissolution = 4 g110.986…

Q: A chemist measures the energy change AH during the following reaction: 2 NH3(g) → N₂(g)+3H₂(g) Use…

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Q: Titanium reacts with iodine to form titanium(III) iodide, emitting heat:2 Ti(s) + 3 I2(g)…

A: From the given chemical equation and data it is clear that  839 KJ energy is released from two moles…

Q: When CO(g) reacts with NO(g) according to the following reaction, 373 kJ of energy are evolved for…

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Q: Given the following thermochemical equations: H2 (g) + F2 (g) → 2HF (g) ΔH = -537 kJ C (s) + 2F2 (g)…

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Q: Consider the hypothetical thermochemical equation 3 A + B → 2 C for which ΔH = 63.1 kJ/mol. If the…

A: 3A + B -> 2C

Q: For the chemical reaction Ca (s) + ½ O₂ (g) → CaO (s) ∆H° = -635 kJ/mol. What is the enthalpy for…

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Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 567.0 mg sample…

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Q: Use the following information to determine the enthalpy for the reaction shown be CHĄ(g) + H2O(g) →…

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Q: Determine the standard enthalpy (ΔH) for this reaction and explain the cooling effect that is…

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