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.

Q: A 50.0-mL sample of a 1.00 M solution of is mixed with 50.0 mL of 2.00 M KOH in a calorimeter. The…

A: Given: Volume of CuSO4 solution = 50.0 mL = 0.050 L                                 (Since 1 L =…

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

A:

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

A: Given - Heat energy released (q)= 50KJ              Work done by the system (w)= 40KJ   We have to…

Q: When 100. mL of 1.00 M Ba(NO3)2 solution is mixed with 100. mL of 1.00 M Na₂SO4 (both solutions…

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Q: Iron(III) oxide reacts with carbon monoxide to produce elemental iron and carbon dioxide. Determine…

A: To solve this problem we have to calculate the enthalpy change of the reaction .

Q: A piece of calcite is heated to 72.0°C and placed in a styrofoam coffee cup containing 25.0 mL of…

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

A: In an exothermic reaction, heat is released, and in an endothermic reaction, heat is absorbed.

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: Iculate föllowing. aicate if the system do work on the surroundings or the surroundings do work on…

A: Hi! there, since there are multiple questions posted. We are answering first question. If you need…

Q: Consider the following reaction: 2 PbS (s) + 3 O2 (g) → 2 PbO (s) + 2 SO2 (g) AHxn = -827.4 kJ What…

A:

Q: PCl3 is a compound used to manufacture pesticides. A reaction requires that 100.0 g of PCl3 be…

A: Applying formula Q= mc∆t

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: You determine that 143 J of energy as heat is required to raise the temperature of 94.28 g of zinc…

A: Specific heat capacity of a substance is amount of heat required to raise temperature of a substance…

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

A: Given data mass of element = 300 g Initial temperature of element = 115 oC mass of ice melt = 110 g…

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

A: Given,a, mass of metal = 59.047 gInitial temperature of metal = 100.0 oCvolume of water = 100.0…

Q: Determine the enthalpy of reaction for 2CH₄(g) → C₂H₄(g) + 2H₂(g) using the equations: 2C₂H₆(g) +…

A: Our desired equation is: 2CH₄(g) → C₂H₄(g) + 2H₂(g) ; ∆Ho = ?? In order to get the desired equation,…

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

A: The enthalpy of the reaction is calculate using Hess' law. This law states that regardless the…

Q: A chemist is asked to determine the specific heat capacity of an unknown mineral. The 189-g sample…

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Q: In an experiment, 27.0 g of metal was heated to 98.0°C and then quickly transferred to 150.0 g of…

A: The energy released by the metal is used by the water to raise its temperature from  20.0°C to…

Q: In a coffee-cup calorimeter, 120.0 mL of 1.4 M NaOH and 120.0 mL of 1.4 M HCl are mixed. Both…

A: Volume of 1.4 M NaOH taken, V = 120.0 mL Volume of 1.4 M HCl taken, V = 120 mL

Q: ILL tungsten by 2 Suppose a sample of NaCl increased in temperature by 2.5 K when th. sample…

A: Given  ΔT =  2.5 K Q = 1.7* 102 J C = 50.5 J/K.mol n = no. of moles of Nacl =?

Q: A 0.1694 g sample of benzopenone(C13H10O) is burned in a bomb calorimeter that has a heat capacity…

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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: When a 3.00-g sample of liquid octane (Cg H18) burns in a bomb calorimeter, the temperature of the…

A: The amount of heat released in the combustion of 3 g liquid octane gets absorbed by the calorimeter.…

Q: The specific heat capacity of a pure substance can be found by dividing the heat needed to change…

A: Given heat capacity of substance = Mass of substance = 383 gChange in temperature =

Q: In a coffee-cup calorimeter, 120.0 mL of 1.1 M NaOH and 120.0 mL of 1.1 M HCl are mixed. Both…

A: Given, In a coffee-cup calorimeter, 120.0 mL of 1.1 M NaOH and 120.0 mL of 1.1 M HCl are mixed. Both…

Q: Use standard enthalpies of formation to calculate the amount of heat released per kilogram of…

A: The enthalpy of combustion of methanol (ΔHcom) is defined as the equation (1) where ΔfHCH3OH is the…

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: The energy content of food is typically determined using a bomb calorimeter. Consider the combustion…

A: Given: Mass of sample of butter = 0.48 g Heat capacity of calorimeter = 2.67 kJ/°C Temperature of…

Q: When 108 g of water at a temperature of 23.1 °C is mixed with 66.1 g of water at an unknown…

A:

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…

A: Given that,  Weight of Iron block m = 1.6 Kg Initial temperature of iron block Ti, i = 28°C Final…

Q: A chunk of tungsten weighing 18.64 grams and originally at 97.78 °C is dropped into an insulated cup…

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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: The standard enthalpies of combustion (ΔH°comb) of C6H6(g) and C2H2(g) are –3301 kJ/mol and –1300…

A: Given combustion reaction; C6H6 (g)  →  3C2H2 (g) ΔH°comb of C6H6 (g) = -3301 KJ/mol ΔH°comb   for…

Q: A 2.5 g sample of NH4NO3 is dissolved in 135 g of water in a Styrofoam cup, changing the temperature…

A: Data given: Mass of NH4NO3 dissolved = 2.5 g Mass of water = 135 g Initial temperature, T1 = 25.1 °C…

Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 0.55 kg sample…

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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…

A: For a chemical reaction or physical process to occur a certain amount of energy should be furnished…

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

A: Hess law is states that overall change in enthalpy of reactions is equal to sum of enthalpy change…

Q: metal X =48.1g; specific heat capacity =0.228 J/C If metal X is heated to 95.1C and put into a…

A:

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…