For which of the following reaction is the enthalpy change for the reaction equal to ΔHf° of the product? A. N2 (g) + 3 H2 (g) → 2 NH3 (g) B. CO (g) + ½ O2 (g) → CO2 (g) C. 2 H (g) → H2 (g) D. C (graphite) + 2 H2 (g) → CH4 (g) E. H2 (g) + Cl2 (g) → 2 HCl (g)

Q: A scientist measures the standard enthalpy change for the following reaction to be 543.2 kJ :…

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Q: 5.99 From the enthalpy of formation for CO, and the following information, calculate the standard…

A: Given data:  ∆H°=-283 kj/mol From standard table;  ∆Hf°(CO2(g) is given by, ∆Hf°=-393.5 kj/mol

Q: Which of the following reactions is accompanied by an increase in enthalpy? Select one: O 2s03(g) -…

A: 2SO3 (g)    →     2SO2 (g)   + O2 (g)  ; ∆rH° = +197 kJ  This reaction is endothermic and…

Q: Calculate the enthalpy change for the combustion of 35.5 g gaseous propane (C3H8). C3H8 (g) + 5 O2…

A: Given, Mass of propane = 35.5 gMolar mass of propane = 12×3 + 8×1 g = 44 g∴ Moler of prepane =…

Q: Given the thermochemical equations A(g) B(g) AH = 60 kJ %3D B(g) - C(g) AH = –140 kJ %3D find the…

A: When a thermochemical reaction is reversed , ∆H sign will be inverted . When a thermochemical…

Q: For the chemical reaction H₂ (g) + F₂ (g) → 2 HF (g) ∆H° = -79.2 kJ/mol. What is the enthalpy (in…

A: The reaction given is, => H₂ (g) + F₂ (g) → 2 HF (g)…

Q: A scientist measures the standard enthalpy change for the following reaction to be -976.0 kJ:…

A: Answer :-  The standard enthalpy of formation of H2O(g) = -253.5 kJ/mol.…

Q: (a) Consider the following chemical reaction: 3FE203(s) + C0(g) → 2FE304(s) + CO2(g) AH° = ? Use the…

A: Thermodynamics is the branch of chemistry that mainly deals with the heat transfer between system…

Q: Liquid hydrogen peroxide releases oxygen gas in its decomposition. 2 H202 - 2 H20 + O2 AH rxn =…

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Q: An engineering student wants to study the heat transfer between a 50 g of heated block of iron (cFe…

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Q: What is the enthalpy of reaction, ΔH, for the formation of tungsten carbide, WC, from itselements? W…

A: The required equation is given below. W(s) + C (graphite) → WC (s)

Q: Given the following thermochemical equations, (a) C2H2(g) 02(g) → 2C02(8) + H2O{1) AH = – 1299.5 kJ…

A: The decomposition reaction  of acetylene is : C2H2 (g) → 2C(s) + H2(g)     The given reactions are:…

Q: A piece of chromium metal with a mass of 24.55 g is heated in boiling water to 98.3 °C and then…

A: Here we are required to find the specific heat capacity of Chromium

Q: Compounds of boron and hydrogen are remarkable for their unusual bonding and also for their…

A: The given reaction is, ΔHrxn = −755.4 kJ   Total 7.313 Kg = 7313 g B2H6 is reacted.   molar mass of…

Q: Given the following reactions: N2(g) + 2 O2(g) → 2 NO2(g)                         ΔH = 66.36 kJ…

A: The enthalpy of the reaction is considered as the state function that is it depends only on the…

Q: Meals-ready-to-eat (MREs) are military meals that can beheated on a flameless heater. The heat is…

A: Specific heat- Specific heat is the amount of heat required to raise the temperature of 1g of…

Q: Given the standard enthalpy changes for the following two reactions: (1) 4C(s) +…

A: • The required thermochemical equation is,  2C2H4(g)+ H2(g) → C4H10(g) ; ∆H° = ?    • The given…

Q: Use Hess's law to calculate the heat of reaction (AHpx) for the following reactions. 1. Calculate…

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Q: Given the standard enthalpy changes for the following two reactions: ΔΗ° = 9.2 kJ (1) N₂(g) + 2O2(g)…

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Q: a) Consider the reaction B2H6(g) + 3 O2(g) → B2O3(s) + 3 H20(g) AH = -2035 kJ How much heat is…

A: Formula used :- Q = mCpdT  Where m is mass , Cp is specific heat capacity and dT is change in…

Q: Given the thermochemical equations   A(g)⟶B(g)                  Δ?=70 kJ     B(g)⟶C(g)…

A: Enthalpy changes for the given reaction is determined as follows,

Q: The standard enthalpy changes for formation of ammonium oxide and iron 3 oxide are 2Al+3/2O^2→Al2O^3…

A: The standard enthalpy of particular reaction can be calculated from the standard enthalpies of the…

Q: 1. Coal gasification converts coal into a combustible mixture of carbon monoxide and hydrogen,…

A: We know enthalpy is a state function that means depend on initial and final position . It is also…

Q: Nitric acid can be formed in two steps from the atmospheric gases nitrogen and oxygen, plus hydrogen…

A: We have to calculate the net change in enthalpy for the formation of one mole of nitric acid.

Q: (1) N2(g) + O2(g)2NO(g)...... ΔH° = 181.8 kJ (2) N2(g) + 2O2(g)N2O4(g)......ΔH° = 9.2 kJ what is…

A: The enthalpy change of the system is a state function. The change in enthalpy does not depends on…

Q: For which reaction below does the enthalpy change under standard conditions correspond to a standard…

A: Standard enthalpy of formation of a compound is defined as the standard enthalpy change when one…

Q: Carbon disulfide is a colorless liquid. When pure, it is nearly odorless, but the commercial product…

A: Record the given data, To calculate standard enthalpy change: The equation is given as,

Q: A 50.0-g sample of a copper-zinc alloy is heated to 100.0oC. The hot metal is quickly added to 100.0…

A: Specific heat capacity is the amount of heat in Joules is required by the substance to raise its…

Q: 1. Consider the following reaction:            2CH3OH(g) --> 2CH4(g)+ O2(g)    ΔH= 252.8 kj  (a)…

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Q: Given the thermochemical equations A(g)⟶B(g)ΔH=90 kJA(g)⟶B(g)ΔH=90 kJ B(g)⟶C(g)ΔH=−120…

A: All feasible reactions occurring in nature yield products either by absorbing or by releasing…

Q: Calculate ∆H for the reaction H2SO4(l) → SO3(g) + H2O(g) given the following chemical equations and…

A: Given, H2S(g) + 2 O2(g) → H2SO4 (l)                      ΔH = –235.5 kJ       Equation (1) H2S(g) +…

Q: Consider the following equations. 2Al (s) + 32O2 (g) → Al2O3 (s)    ΔHƟ = −1670 kJ Mn (s) + O2 (g)…

A: Hess’s Law of constant heat summation states that the total enthalpy change for a multistep reaction…

Q: When 50 mL of 0.100 M AgNO3 is combined with 50 mL of 0.100 M HCl in a coffee-cup calorimeter, the…

A: YOu need to know that both solution are aq and the volume is additive in nature. the Heat absorbed…

Q: For which reaction below does the enthalpy change under standard conditions correspond to a standard…

A: To identify: A reaction for which the enthalpy change of the reaction corresponds to a standard…

Q: Which of the following is a statement of Hess's law?     If a reaction is carried out in a series of…

A: Thermodynamics is branch of chemistry in which we deal with amount of heat absorbed or evolved…

Q: The standard enthalpy changes for the combustion of carbon and carbon monoxide are shown below. C(s)…

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Q: What is the standard enthalpy change for the reaction?  2NH3(g)N2H4(l) + H2(g) N2H4(l) + O2(g)N2(g)…

A: If A + B→C + D                ΔH =   ΔH2 then C + D → A + B        ΔH = - ΔH1 and for  2 ( A + B → C…

Q: Meals-ready-to-eat (MREs) are military meals that can be heated on a flameless heater. The heat is…

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Q: For the chemical reaction H2 (g) + F2 (g) – 2 HF (g) AH° = -79.2 kJ/mol. %3D What is the enthalpy…

A: The given enthalpy of the reaction is -79.2 kJ/mol for the reaction: H2 (g) + F2 (g) → 2HF (g)

Q: A) Given the standard enthalpy changes for the following two reactions: (1) 2C(s) +…

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Q: Natural gas burns in air to form carbon dioxide and water, releasing heat. CH4(g) + O2(g) → CO2(g)…

A: Given : Mass ( m ) = 23 gram Temperature (∆T) = 32°C   Find mass of CH4 = ??

Q: For the reaction below (which will be labeled reaction A), the reaction enthalpy is unknown:…

A: The enthalpy change is a state function and the Hess law states that the change of enthalpy in a…

Q: Use Hess's Law to calculate the enthalpy for this reaction: 4SO3(g)→4S(s) + 602(g) AH°rxn = ??? kJ…

A: Given, a) SO2(g) ➝ S(s) + O2(g)   ∆H° = +296.8 kJ b) 2SO2(g) + O2(g) ➝ 2SO3(g)  ∆H° = -197.8 kJ…

Q: For the chemical reaction H2 (g) + F2 (g) → 2 HF (g) AH° = -79.2 kJ/mol. What is the molar enthalpy…

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Q: Use standard enthalpies of formation in the table above to determine ΔHorxnΔHrxno for the reaction:…

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Q: What is the standard enthalpy change for the reaction? 2NH3(g)→N2H4(1) + H2(g) AH°1 = -543 kJ-mol-1…

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Q: Consider the following reaction:CH4(g) + 2O2(g) -----> CO2(g) +2H2O(l)          ΔH= -891 kJ A.)…

A: a) Since the enthalpy change when 1 mole of CH4 is reacting is = ΔH= -891 kJ Hence enthalpy change…

Q: The enthalpy of solution (∆H) of KOH is -57.6 kJ/mol. If 5.61 g KOH is dissolved in enough water to…

A: Given: Volume of solution = 150.0 mL Density of solution = 1.02 g/mL. Enthalpy of solution of KOH =…

Q: For the reaction N2(g) + O2(g) --> 2 NO(g), with a standard enthalpy change of 180.5 kj, how much…

A: For the reaction: N2(g) + O2(g) → 2 NO(g) The required amount of product= 35 moles NO(g) The energy…