What is the enthalpy change if 45.0 g of CaO is allowed to react with an excess of carbon?

Q: 3) what mass of mathane must be burned in erder to liberate 12,773 kJ of heat ? ()

A: NOTE : Since it is not clearly mentioned whether the heat released is 12.774 KJ or 12773 KJ, hence…

Q: How much heat is produced by burning 4.00 moles of acetylene under standard state conditions?

A: Moles of acetylene= 4

Q: What is the enthalpy change of the reaction:

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Q: When 3 moles of C is formed, what is the change in enthalpy? 3A + 6B + 5 kJ → 2C

A: Answer given below

Q: What does "Enthalpy change of a chemical reaction" mean?

A: Enthalpy change of a chemical reaction is defined as the amount of heat released or absorbed in the…

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

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Q: Use the given standard enthalpies of formation to calculate ΔH° for the following reaction:…

A: Consider the given reaction as; 3 Fe2O3 s + CO g → 2 Fe3O4 s + CO2 g ∆Hrxno=Σn∆Hfo products- Σm∆Hfo…

Q: enthalpy of

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Q: When 0.378 g of sodium metal is added to an excess of hydrochloric acid, 3930 J of heat are…

A: Given-> Weight of Na = 0.378 g Heat produced for 0.378 g = 3930 J  (1 KJ = 1000 J)

Q: What is the enthalpy of reaction (∆Hrxn)? Why is this quantity importan

A: ANSWER

Q: If 890 kJ is released during the combustion of 1 mol of methane, what is the heat of reaction if…

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Q: How many kilojoules of heat will be released when exactly 1 mole of iron, Fe, is burned to form…

A: The reaction for standard enthalpy of formation of Fe2O3 is depicted by equation.

Q: Calculate the enthalpy change of the exothermic reaction

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Q: How much heat is released when 1.4 mol of hydrogen fluoride are produced

A: H2(g) + F2(g) = 2HF(g) ∆H= -536 kJ/mol

Q: How do you calculate ∆H°rxn from tabulated standard enthalpies of formation?

A: The standard enthalpies of formation for chemical species are measured at 298 K and 1 atm pressure…

Q: 2. A system performs 3.63 kJ of work and gives off 8.98 kJ of heat. What is the change in energy of…

A: To solve this problem we will use First Law of Thermodynamics  .  According to this law  ∆E = q + w…

Q: what is the standard enthalpy change for the reaction: (3) C2H4(g) + H2(g)C2H6(g) AH° = ?

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Q: Calculate the standard enthalpy change

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Q: Calculate the heat evolved when 266g of white phosphorus (P.) burns in air according to the…

A: We know that:  Buring reaction of P4 in air:  P4(s) + 5O2(g) ....> P4O10(s)  And this reaction…

Q: which is the correct enthalpy of formation reaction for nitrogen monoxide gas?

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Q: if 124 KJ of heat is absorbed in a reaction that forms nitric oxide from nitrogen and oxygen what…

A: The following information given in the question - The heat absorbed for NO produced = 124 kJ   The…

Q: Calculate ΔH (in kJ/mol) for the reaction described by the equation. 6 NH3(g) + 5 O3(g) → 6 NO(g) +…

A: Tha delta H represents the enthalpy change during the reaction. Now if the enthalpy change is…

Q: the enthalpy for the decomposition of liquid water into gaseous hydrogen and oxygen

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Q: What is the enthalpy change if 40.0 g of  is allowed to react with an excess of carbon?

A: Enthalpy change : It the energy change i.e. when the number of moles of products will be formed from…

Q: Calculate the approximate enthalpy change, AHn, for the combustion of one mole of methane a shown in…

A:

Q: 3. If 124 kJ of heat is absorbed in a reaction that forms nitric oxide from nitrogen and oxygen,…

A: 3. Sol :-  Given,  Amount of heat absorbed = 124 KJ  Reaction between N2 and O2 takes place to gives…

Q: which is the correct enthalpy of formation reaction for nitrogen dioxide gas?

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Q: Calculate the enthalpy change for the reaction of ti

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Q: How much heat is released during the combustion of 1.24 kg of C5H12?

A: Given: 1.24 kg of C5H12 The conversion of kg into g is as follows. 1 kg=1000 g1.24 kg=1240 g

Q: MCQ 20: Enthalpy change of atomization involves the production of gaseous atoms from its A. atoms B.…

A: The Enthalpy of atomization is change in enthalpy when one mole of gaseous atom is formed from its…

Q: How do you calculate ΔH°rxn from tabulated standard enthalpies of formation?

A: It is a thermodynamic property and is generally used when we need to calculate heat or energy in a…

Q: Using the standard enthalpy of formations from the table below, calculate the standard enthalpy…

A: Enthalpy change of the given reaction is given as enthalpy of formation of products - enthalpy of…

Q: 3. Explain why the standard enthalpy of formation of carbon in

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: a. Calculate the enthalpy of reaction for: 2 CO(g) + O2(g) → 2 CO2(g) b. If 18.5 grams of carbon…

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Q: What is the enthalpy change when 34.0 grams of NH3 (g) (molar mass = 17.0 g/mol) are formed by the…

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Q: Write at least two reactions that show enthalpy. State the reactants and the products of the…

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Q: Calculate the enthalpy of the reaction: CH4 (g) + O2 (g)  2H2O(g) + C(s)

A: We have to calculate the enthalpy of given reaction.

Q: 2SO2(g) + O2(g) → 2SO<(g) DH= -198.2 kJ/mol Calculate the heat evolved when 87.9 g of SO2 (molar…

A: Note: Since you have posted multiple independent questions in the same request, we will solve the…

Q: calculate the standard enthalpy change for this reaction.

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Q: follow, calculate the standard enthalpy change for this reaction.

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Q: Calculate the Enthalpy of Reaction 2CH3OH(I) + 302(g) → 2CO2(g) + 4H2O(1I)

A: ∆H°f (CO2(g) ) = -393kj/mole ∆H°f (H2O(l)) = -286kj/mole ∆H°f (CH3OH(l)) = -238.7kj/mole

Q: What mass of galena (PbS) is converted to lead (II) oxide if 200 kJ of heat are produced?

A:

Q: How much heat is released when 1.4 mol of hydrogen fluoride are produced?

A: During the reaction, the heat might be absorbed or it will be released. The process where heat is…

Q: Determine the enthalpy of reaction for the following: H2(g) + ¹/2O2(g) → H₂O(g)

A: Given reaction: H2(g) + 12 O2(g) → H2O(g) We have to find the enthalpy of reaction.

Q: 9.) If 124 kJ of heat is absorbed in a reaction that forms nitric oxide from nitrogen and oxygen,…

A: The reaction can be written as follows,                 N2(g) + O2(g)  2NO(g)   ΔHrxn = 2ΔHof NO(g)…

Q: How much heat is produced by combustion of 125 g of methanol under standard state conditions?

A: Given: Mass of methanol(CH3OH) = 125 g ΔH = -764 KJ/mol Molar mass of CH3OH = 32.04 g/mol

Q: enthalpy o

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Q: standard enthalpy change for this reaction.

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Thermochemistry

Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.    

Exergonic Reaction

The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.