The average bond enthalpy for the C-H bond is 412kJ/mol. which process has an enthalpy change closest to this value? * CH4(g) = C(s) + 4H(g) CH4(g) = C(g) + 2H2(g) CH4(g) = C(s) + 2H2(g) %3D CH4(g) = CH3(g) + Hg) %3D

Q: Nitric oxide (NO) can be formed from nitrogen, hydrogen and oxygen in two steps. In the first step,…

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Q: (a) Elemental boron reacts with fluorine to form BF3, a gas. Write a balanced chemical equation for…

A: (a) Elemental boron react with fluorine to form BF3 , which is a gas.  The reaction equation is ,…

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

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Q: For which one of the following is the enthalpy of the reaction the same as the enthalpy of…

A: Enthalpy of fornation :-  The enthalpy change involved in the formation of 1 mole of a compound from…

Q: Fe,O3(s), with carbon monoxide, CO(g), as shown in the balanced equation below: Fe,O3(s) + 3CO(g) →…

A: given (1) CO(g) + 1/2O2(g) → CO2(g)                       ΔH° = -283 kJ (2) 2Fe(s) + 3/2O2 (g) →…

Q: A scientist measures the standard enthalpy change for the following reaction to be -1142.2 kJ:…

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Q: 5. Sand is converted to pure silicon in a three step process. The third step is SiCl,(g) + 2Mg(s) →…

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Q: A scientist measures the standard enthalpy change for the following reaction to be -111.2 kJ :…

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Q: A scientist measures the standard enthalpy change for the following reaction to be -773.2 k) :…

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Q: A scientist measures the standard enthalpy change for the following reaction to be -820.7 kJ…

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Q: 3. A 1.25-g sample of ammonium nitrate dissolves in water to make 35.0 mL of solution in an…

A: Given,  Mass of NH4NO3 = 1.25 g  Volume of the solution = 35.0 mL  Initial temperature= Ti = 24.6 0C…

Q: Sand is converted to pure silicon in a three step process. The third step is   SiCl4(g) + 2Mg(s) →…

A: Given:SiCl4(g)  + 2Mg(s) → 2MgCl(s)  + Si(s)        ΔH  = –625.6 kJ

Q: Using standard heats of formation, calculate the standard enthalpy change for the following…

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Q: A scientist measures the standard enthalpy change for the following reaction to be -956.8 kJ:4NH3(g)…

A: Given: 4NH3(g) + 5 O2(g)4NO(g) + 6 H2O(g) ΔH= –956.8 KJ ΔHf of NH3 = –46.11 KJ ΔHf of O2 = 0 KJ ΔHf…

Q: Propane (C3H8) burns according to the following balanced equation: C3H8(g)+5O2(g)→3CO2(g)+4H2O(g)…

A: The given combustion reaction is given below : C3H8(g)  +  5O2(g)  →  3CO2(g)  +  4H2O(g) Given…

Q: Methanol, CH3OH, is a possible fuel for automobiles. Energy is evolved in its combustion with…

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Q: Part A Hess's law states that "the heat released or absorbed in a chemical process is the same…

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

A: Enthalpy is a state function  do it does not depend on the path it travelled as well as extensive…

Q: Is enthalpy change an extenive or intensive property? What impact does this have on the quality of a…

A: The enthalpy of a system is nothing but the sum of internal energies of the system and its…

Q: enthalpy change for the following reaction to be -826.6 kJ : Fe2O3(s) + 2 Al(s)Al2O3(s) + 2 Fe(s)…

A: Heat of reaction is defined as difference of energy of product  and energy of Reactant. If heat of…

Q: If the complete reaction of 45.0 g of B(s) requires 74.93 kJ of heat to be absorbed from the…

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Q: 3,000 J of heat is added to a system and 2,500 J of work is done by the system. What is the change…

A: Given: The heat added to the system is 3000 J. The work done by system is 2500 J. Introduction:…

Q: Given the following two reactions and their enthalpy changes,             2 ClO2 (g)   -->   Cl2 (g)…

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Q: Given the following two reactions and their enthalpy changes,             2 ClO2 (g)   -->   Cl2…

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Q: A scientist measures the standard enthalpy change for the following reaction to be -819.0 kJ :CH4(g)…

A: The given reaction is, Standard enthalpy of formation of CH4(g), O2(g) and H2O(g) is given below,

Q: A scientist measures the standard enthalpy change for the following reaction to be -780.8 kJ :…

A: The difference between the change in enthalpy of products and the reactants  is known as change in…

Q: Methane combustion provides a significant fraction of the world's primary energy, and is used for…

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Q: Is the change in enthalpy for a reaction an extensive property?

A: The enthalpy of a system is the sum of internal energies of the system and its  additional pressure…

Q: Using the standard enthalpies of formation, what is the standard enthalpy of reaction? CO(g) +…

A: CO(g) + H2O(g) ---> CO2(g) + H2(g) The values of standard enthalpy of formation not given in…

Q: Using standard heats of formation, calculate the standard enthalpy change for the following…

A: Given;  Note: for standard enthalpy of formation, values are taken from the standard books.

Q: Using standard heats of formation, calculate the standard enthalpy change for the following…

A: Difference between enthalpy of formation of product to the enthalpy of formation of reactant is…

Q: 5. Enthalpy of formation a. For which of these reactions at 25 °C does the enthalpy change represent…

A: a) Standard enthalpy of formation is the change in enthalpy when one mole of compound is formed from…

Q: Hydrazine, N2 H4, is a colorless liquid used as a rocket fuel. What is the enthalpy change for the…

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Q: For which one of the following is the enthalpy of the reaction the same as the enthalpy of…

A: Answer:- The enthalpy change during a chemical reaction in which one mole of  product ifs formed…

Q: 2NO(g) + 02(g)–2NO2(g) Based on this value and the standard enthalpies of formation for the other…

A: Given  2NO (g) + O2 (g) ---> 2 NO2 (g)  ∆H rxn = -112.0 KJ  ∆H°f (NO2) = ?

Q: Consider these reactions, where M represents a generic metal. 1. 2 M(s) + 6 HCl(aq) 2 MCl, (aq) + 3…

A: By using the few reactions we can calculate the enthalpy of a particular reaction .

Q: Hydrazine, N3H4, is a colorless liquid used as a rocket fuel. What is the enthalpy change for the…

A: ΔH is an extensive property....

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

A: Given data is as follows: N2(g) + 3H2(g) → 2NH3(g)                              ∆H1=-92 kJ…

Q: Using the standard enthalpies of formation, what is the standard enthalpy of reaction?…

A: Enthalpy change of a reaction is calculated by subtracting the sum of enthalpies of formation of…

Q: When 10.00 g of phosphorus is burned in O2( g) to form P4O10(s), enough heat is generated to raise…

A: Given; M = 10.0 g c = 4.2jgC ∆T = (38-18)oC

Q: 1. Why is it necessary to indicate the physical state of all reactants and products when giving the…

A: Enthalpy change of the reaction (ΔHrxn) is the amount of energy change during a chemical reaction.

Q: A scientist measures the standard enthalpy change for this reaction to be 134.5 kJ/mol: Fe2O3(s) + 3…

A: The expression of change in enthalpy is shown below:

Q: According to the following reaction, what is the change in enthalpy (kJ) per mole of the reaction?…

A: Enthalpy of Reaction: The difference in enthalpy between products and reactants ( HrxnHrxn ) is the…

Q: A scientist measures the standard enthalpy change for the following reaction to be -171.6 kJ :HCl(g)…

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Q: A scientist measures the standard enthalpy change for the following reaction to be -67.6 kJ :…

A: The expression for the calculation of change in enthalpy is shown below: where; ∆Hproducts =…

Q: A scientist measures the standard enthalpy change for the following reaction to be -104.0 kJ : CO(g)…

A: The given chemical reaction is as follows: CO(g) + Cl2(g) → COCl2(g)            ∆rH°=-104 kJ The…

Q: If this reaction N2(g) + 2 O2(g) yields 2 NO2(g) is reversed and multiplied by 3 and the given…

A: Given :-  N2(g) + 2O2(g) → 2NO2(g)  ∆H = 68 kJ  To calculate :-  Final enthalpy change on reversing…

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

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Q: Acetic acid, CH3COOH, is contained in vinegar.  Suppose acetic acid was formed from its elements,…

A: The given Reactions and data are- 1. CH3COOH(l) + 2 O2(g) -> 2 CO2(g) + 2 H2O(l)   ,   ∆H° = -871…