Using standard heats of formation, calculate the standard enthalpy change for the following reaction. 2HBr(g)-------->H2(g) + Br2(l)   Answer: _______kJ

Q: Calculate the standard enthalpy of formation of liquid methanol, CH,OH(I), using the following…

A: Standard enthalpy of formation: When 1 mole of substance is changed into other constituents by the…

Q: When 0.7521 g of benzoic acid was burned in a calorimeter containing 1,000. g of water, a…

A: Mass of benzoic acid burned is = 0.7521 g The heat of combustion of benzoic acid s= -26.42 kJ/g

Q: 4NH3(g) +50₂(g) = 4NO(g) + 6H₂O(g) ΔΗ° = -1000. kJ K = 1.35 When the reaction is altered as below,…

A: When an equation is reversed (written in the opposite reaction), the sign of ΔHo must also be…

Q: Part A When 1 mol of a fuel burns at constant pressure, it produces 3451 kJ of heat and does 16 kJ…

A: Given: 1 mol of fuel burns at constant pressure. Heat produced = 3451 kJ Work done = 16 kJ To…

Q: What is the standard enthalpy of formation of liquid diethylamine, (CH3CH2)2NH? N205(g) + 8CH4(g) →…

A: Given⇒      N2O5g+8CH4g→2CH3CH22 NHl+5H2Ol                            ∆H°=-1308 KJ

Q: Direction: Use Hess’ Law in determining the change in enthalpy of the chemical reaction. Follow the…

A: ΔH° for NO2 (g), produced from NO (g) and O (g) according to the following reaction: NO (g) + O (g)…

Q: 7) A 14.0 g of NaOH is placed in a copper calorimeter filled with 100.0 ml of water. How is the…

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Q: An electric range burner weighing 669.0 grams is turned off after reaching a temperature of 459.6°C,…

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Q: Part A Calculate the enthalpy of the reaction 2NO(g) + O2(g)→2NO2(g) given the following reactions…

A: Determination of enthalpy of the reaction: Given equation:

Q: 4 NH3 (g) + O2 (g) ➝ 2 N2H4 (g) + 2 H2O (l)     ΔHº = –196.42 kJ • Calculate the overall change in…

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

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Q: Question 10: Find the standard enthalpy of formation of ethylene, C,H49)» given the following data:…

A: Given, C2H4(g) +3O2(g) → 2CO2(g) +2H2O(I)       ∆Hrxn°= -1411 kJ     (I)C(s) +O2(g) → CO2(g)…

Q: An electric range burner weighing 639.0 grams is turned off after reaching a temperature of 497.2°C,…

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Q: How did they find the mixing temperature of 29.11 C? Thank you for your help!

A: Given information:Temperature of 50.0 mL cooler water (T1)= 20.91 ℃.Temperature of 50.0 mL warmer…

Q: Multiple Choice: The value of ΔH0for the reaction is -6535 kJ.  What is the heat released in the…

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

Q: Use the enthalpy of formation data provided on the instruction page to calculate the overall…

A: The enthalpy change of a reaction is equal to the sum of standard enthalpy of formation of products…

Q: Part A Calkulate the enthalpy of the reaction 2NO(g) + Oz(x)→2NO;(g) given the following reactions…

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Q: If ethanol (15.0 g) is burned, how much heat is released? Ethanol MW = 46.07 g/mol C2H5OH(l) +…

A: Moles of EtOH = weight/mol. wt. = 15/46.07 = 0.3256 moles

Q: a) Calculate the enthalpy of reaction at 25°C for the burning of butane: 2 C4H10 (g) + 13 O₂ (g) → 8…

A: Dear student , As you have asked multiple part question but according to guidelines we will solve…

Q: At 100 ⁰C and 5 atm, enthalpy symbol is ΔH⁰ For TCE's of ΔHc, it is necessary that the product is 1…

A: At 100 ⁰C and 5 atm, enthalpy symbol is ΔH⁰. This statement is True. For TCE's of ΔHc, it is…

Q: 5.00 g of banana reacts with excess oxygen in a bomb calorimeter with a heat capacity of 10.3 kJ/°C.…

A: Given,  Mass of banana = 5.00 g  Heat capacity of bomb calorimeter = 10.3 KJ/0C Initial temperature…

Q: A 30.5 gram sample of an alloy at 93.0 C is placed into 50.0 grams of water at 22.0 C in an…

A: Given, 30.5-gram sample of an alloy at 93.0 C is placed into 50.0 grams of water at 22.0 C in an…

Q: Constants | Periodic Table Titanium reacts with iodine to form titanium (III) iodide, emitting heat.…

A: Heat emmited = -839 KJ

Q: Part IllI: Determine the molar enthalpy change for reaction 3 using Hess's law HCl(aq) + NH3(aq) ®…

A: The standard enthalpy of formation of HCl(aq) is -167.2kJ/mol. The standard enthalpy of formation of…

Q: Calculate the heat capacity of the calorimeter in J/°C. Report answer in Proper SF. No need to…

A: 1) For Hot water Mass of hot water = Density x Volume = 1g/mL x 20 mL = 20g   Qhot = mCp ∆T Where,…

Q: The combustion of 3.00 grams of octane, C8H18, in a bomb calorimeter resulted in a temperature…

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Q: PRELAB. LAp.J ותרו) 1. How much heat is required to raise the temperature of 30.0 grams of silver…

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

Q: teaauajalal You wish to heat water to make coffee. How much heat (in joules) must be used to raise…

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Q: When 50.0 g of oxygen gas (MW = 32.0) react excess diborane gas (B2H6; MW =D27.6), the enthalpy…

A: Given: When 50.0 g of oxygen gas reacts with diborane gas, the enthalpy change is -1120 kJ.

Q: 2NO(g) + 2H₂(g) = 2H₂O(g) + N₂(g) K = 0.110 AH° = -707 kJ What is the enthalpy for the reaction when…

A: In this question, we will determine the ∆H value of the given second reaction in the equation from…

Q: Chemist place 348 mg of 2-propanol (C:Hs0) and a sufficient amount of H2SO4 into a bomb calorimeter…

A: A numerical problem based on enthalpy concept, which is to be accomplished.

Q: Name: General Chemistry I Laboratory Manual, 2021 Revision Hess' Law Pre-Lab Date: 1) Determine the…

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Q: An electric range burner weighing 655.0 grams is turned off after reaching a temperature of 497.5°C,…

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Q: 1) Given the enthalpy of the following chemical reactions. How much is the change in enthalpy when…

A: Answer: Enthalpy change for a reaction is an extensive property, therefore they can be added or…

Q: An electric range burner weighing 670.0 grams is turned off after reaching a temperature of 474.8°C,…

A: Given : Mass of burner = 670.0 g Initial temperature of burner = 474.8 oC Final temperature of…

Q: metal pellet with a mass of 100.0 g, originally at 88.4°C, is dropped into 125 g of water originally…

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Q: 0.50 of Mg reacts with excess oxygen in a bomb calorimeter with a heat capacity of 3290 J/°C. The…

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Q: Click the AH is an Extensive Property the screen when you started and its derivative demonstrate…

A: Extensive property :-  The property of a system which depends on the quantity or size of matter…

Q: • Part E Calculate the standard enthalpy of combustion. The standard enthalpy of formation of…

A: The reaction for the combustion of sucrose is: C12H22O11(s)+12 O2(g)→12 CO2(g)+11 H2O(l)

Q: Tutored Practice Pro 5.4.4 COUNTS TOWARDS GRADE Close Problem Use constant-volume calorimetry to…

A: Formula used  q = heat =  CsampledT + mwaterCwaterdT dT = change in temperature, m = mass of water ,…

Q: How many kJ of energy is produced* during the formation of 33.1 g of Fe, according to the reaction…

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Q: A scientist measures the standard enthalpy change for the following reaction to be 543.0 k) :…

A: Given, 2BrF3(g) ➝ Br2(g) + 3F2(g) Standard enthalpy change for the following reaction (∆H°rxn) =…

Q: What mass of H2 would be used in the following reaction if 116.2 KJ was also reacted? Answer to 2…

A: Hydrogen reacts with bromine to form hydrogen bromide. The balanced thermochemical equation for this…

Q: An original reaction and enthalpy is given below. Fe2O3(s) + 3CO(g) → 2Fe(s) + 3C02(g) AH = -23.44…

A: Here  1mol of Fe2O3 = -23.44 KJ            3 mol of Fe2O3 = ?

Q: 2) Please determine the enthalpy for the following reaction using the enthalpies of the three…

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Q: QUESTION 18 The combustion of pentane is shown below. C5H12 (1) + 8 O2 (g) → 5 CO2 (g)+ 6 H20 (g)…

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Q: A large amount of pure copper pipe is found at a construction site, and it weighs 1.32 kilograms.…

A: The heat involved in the process for metals is given by  Q = mC∆T where m = mass of metal = 1.32 Kg…

Q: Part A Click the AH is an Extensive Property button within the activity, and analyze the…

A: Extensive Properties:-The properties of the system whose value depends upon the amount ofsubstance…

Q: Liquid hydrogen peroxide, an oxidizing agent in many rocket fuel mixtures, releases oxygen gas on…

A: Oxidizing agent is a substance that has the ability to oxidize other substance. In other words, it…

Q: An electric range burner weighing 607.0 grams is turned off after reaching a temperature of 474.0°C,…

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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.