How much heat is released by the formation of 18.0 g of CACO,? Show the conversions required to solve this problem. CaO(s) + CO, (g) → CaCO,(s) AH = -331 kJ 18.0 g CaCO, x kJ

Q: Consider the chemical equation 2 A + 3 B ---> 4 C + D The reaction enthalpy is 705 kJ How many…

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Q: When methanol, CH, OH, is burned in the presence of oxygen gas, O2, a large amount of heat energy is…

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

Q: density of water = 1.00 g/ mL The enthalpy changes when a strong acid is neutralized by strong base…

A: Given molar enthalpy of neutralization = - 56.1 kJ/mol  The thermochemical equation can be written…

Q: When octane (C,H3, density = 0.699 g/mL) undergoes complete 18 combustion, it provides energy…

A: Given that, 2 moles of octane release 10932 kJ of energythe density of octane - 0.699 g/mL = 0.699…

Q: The thermite reaction can be written as 2Al(s)+Fe2O3(s)→2Fe(s)+Al2O3(s)                  ΔH∘=−850kJ…

A: Given: The value of  is -850 kJ. The amount of heat released in 314.5 kJ. Introduction: According to…

Q: How much heat (in kJ) is produced by the complete combustion of 52.2 g of CH4? Use 1.01 g/mol for…

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Q: Consider the reaction: CH,OHØ) + 30, )→200,(e) + 3H,O), AH=-1.37 x 10' k When a 21.1-g sample of…

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Q: C 2H 5OH() + 30 2( g)→ 2CO 2( g) + 3H 20( ) AH=-1.37 x 10 3 kJ I. The reaction is endothermic II.…

A: Exothermic reaction is the reaction in which energy is released in the formation of products while…

Q: The highly exothermic thermite reaction, in which aluminum reduces iron(III) oxide to elemental…

A: The balanced reaction taking place is given as, => 2 Al (s) + Fe2O3 (s) -------> 2 Fe (s) +…

Q: 8. How much energy is released, when 45.0 g of methane is burned? AH for the reaction is -891…

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Q: According to the following thermochemical equation, what mass of HF (in g) must react in order to…

A: Molar mass of HF=(1+19) g/mol=20 g/mol

Q: How many grams of C̟H, liquid must decompose according to the following chemical equation to…

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Q: How much heat will be absorbed when 38.2 g of bromine reacts with excess hydrogen according  to the…

A: Given :-  H2 + Br2  + 72.80 kJ → 2HBr  To calculate :-  Amount of heat absorbed when 38.2 g of…

Q: How many moles of H₂ are required to produce -2051 kJ of heat in the following reaction? N₂ (g) + 3…

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

Q: How much heat is generated if 20 grams of hydrogen is consumed in the following reaction?   2H2…

A: Given that:  Combustion reaction of H2 2H2 + O2 .....> 2H2O + 570KJ  In this reaction 570KJ…

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

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Q: Suppose that 0.250 mol of methane, CH4(g), is reacted with 0.400 mol of fluorine, F2(g), forming CF…

A: 0.250 mol  of methane is reacted with 0.400 mol of fluorine.

Q: Sulfur trioxide can be removed from the exhaust gases of power plants by reaction with lime…

A: Balanced chemical equation: CaO(s) + SO3(g) ------> CaSO4 (s) ΔH ° = –886 kJ  This shows that…

Q: Consider the reaction: When a 10.0-g sample of ethyl alcohol (molar mass = 46.07 g/mol) is…

A: The given reaction is : C2H5OH(l)+3O2(g)→2CO2(g)+3H2O(l)        ∆H=-1.37×103 kJ

Q: Calcium hydroxide, which reacts with carbon dioxide to form calcium carbonate, was used by the…

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Q: How much heat (in kJ) is produced by burning 104 g of CH4 under standard state conditions? AH° =…

A: Combustion is the process by which a substance gets burned in air, in presence of oxygen. The heat…

Q: When methanol, CH,OH, is burned in the presence of oxygen gas, O,, a large amount of heat energy is…

A: Enthalpy of reaction = - 764 kJ/mol Energy required = 729 kJ We need to find mass of methanol to be…

Q: Why do we measure the enthalpy of a chemical reaction?

A: A thermodynamic property of a system is known as enthalpy. The sum of internal energy and product of…

Q: heat for the combustion of sucrose (table sugar, C12H22O11) is -5,647 kJ for

A: Number of moles = mass/ molar mass  Number of moles of O2 = mass of O2/molar mass of O2

Q: How much would the temperature of a 61.9 gram sample of grain alcohol increase if it absorbs 305…

A: Given the mass of alcohol is 6.19 grams heat energy Q=305 Joules Suppose the alcohol is ethanol ( As…

Q: Calculate the heat exchanged when 32.0 g oxygen reacts with 16.0 g methane:  CH4(g) + 3/2 O2(g) →…

A: Ans -600kj

Q: Consider the balanced chemical equation: 2Al(s) + Fe2O3(s) -> 2Fe(s) + Al2O3(s) heat of reaction =…

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Q: What is the change in enthalpy in kilojoules when 3.24 g of CH,OH ga completely reacted according to…

A: The question is based on the concept of chemical thermodynamics. we have to calculate the enthalpy…

Q: When 13.99mL of HCl of unknown concentration (but less than that of the base) are reacted with…

A: Given : Concentration of NaOH = 3.172 M Volume of NaOH solution = 15.00 mL = 0.0150 L…

Q: the heat released for a complete reaction of 1 mole of carbon to 1 mole of carbon dioxide is 393kj.…

A: Given,  Given moles of carbon = 1 mole  Moles of CO2 = 1 mole  Amount of heat releases = 393 KJ…

Q: How many moles of H, are required to produce -4551 kJ of heat in the following reaction? N, (g) + 3…

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Q: The combustion of hydrogen-oxygen mixtures is used to produce very high temperatures (ca. 2500 °C)…

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Q: What is the definition of enthalpy? O a. Heat flow in a chemical reaction at constant temperature O…

A: Enthalpy is Heat flow in a chemical reaction at constant pressure.

Q: The enthalpy change for the reaction CH,(g) + 20,(g) → CO,(g) + 2H,O(1) is - 891 kJ for the reaction…

A: The reaction given is Enthalpy change of reaction is -891 KJ.

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: How much heat (kJ) is released by a 200-gram piece of silver as it cools from 1023°C to 300°C?

A: Given :-  Mass of piece of silver (m) = 200 g  Initial temperature (T1) = 1023°C  Final temperature…

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: How many kilojoules of heat are produced when 34.0 g of Fe2O3 reacts with an excess of CO according…

A: In this question, we want to determine the value of heat produced in kJ unit. How we can determine,…

Q: 2A + 3B → C       ΔHrxn = -125 kJ  Determine the amount of heat emitted when each of the following…

A: The enthalpy of reaction is based on the molar quantities of reactants that is given by the…

Q: 2. Carbon tetrachloride can be formed by reacting chlorine with methane: CH4 + 2 Cl2 → CCL4 + 2 H2…

A: CH4 + 2Cl2-----> CCl4 +2H2 ∆Hof (CH4) = -75 kJ/mol ∆Hof (CCl4 ) = -135 kJ/mol

Q: What quantity in moles of H, are required to give off 2301 kJ of heat in the following reaction? N,…

A: We have to calculate the moles of hydrogen gas required.

Q: 3. Using the same calorimeter as in problem 2, a student mixed 180.0 mL of 2.50 M HNO3 with 180.0 mL…

A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: A 5.43 g sample of an unknown salt (MM = 116.82 g/mol) is dissolved in 150.00 g water in a coffee…

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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: When 1.42 g of iron reacts with 1.80 g of chlorine, 3.22 g of FeCl2(s) and 8.60 kJ of heat is…

A: Iron reacts with chlorine to form iron(II) chloride. When 3.22 g of FeCl2s is formed, 8.60 kJ of…

Q: How much heat is evolved when 8.89x10° g of ammonia is produced according to the following equation?…

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Q: 4. Determine the final temperature of water if 9.2 kJ of heat is added to 250 mL of 17°C water (the…

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Q: What is the change in enthalpy in kilojoules when 3.24 g of CH,OH is completely reacted according to…

A: Conversion factors are the numerical values which are used to convert one physical quantity to…

Q: A 0.403-g sample of xanthone (C13H8O2) is burned in a bomb calorimeter and the temperature increases…

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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.