Calculate the enthalpy change of the following phase changes 1. melting of 14.5 g ice 2. condensation of 6.58 g water vapor 3. freezing of 234.5 g water

Q: enthalpy

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Q: The evaporation of water is endothermic:H2O(l) → H2O( g) ∆Hrxn = +44.01 kJWhat minimum mass of water…

A: Determination of no. of mol of H2O that will evaporate from 175 kJ/mol: n=175 kJ44.01 kJ/mol=3.9764…

Q: Given the following thermochemical equations, NO(g) + O3(g) →NO2(g) + O2(g) ΔH = −198.9 kJ/mol…

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Q: 92kJ of heat

A: Exothermic reaction are those in which more energy is released as compared to initially absorbed. to…

Q: Given the following thermochemical equations,   NO(g) + O3(g) →NO2(g) + O2(g) ΔH = −198.9 kJ/mol…

A: In the given question we have to calculate the change in enthalpy by using the Hess's law.

Q: 2 NH3(g) → 3 H2(g) +N2(g) AH298 = 92 kJ/mol,am %3D According to the information above, what is the…

A: Given;

Q: Using the provided table, determine the enthalpy for the reaction:   C₃H₈(g) + 5O₂(g) → 3CO₂(g) +…

A: Given information,    ΔH0 C3H8 = −108.4 kJ/mol ΔH0 O2 = 0 kJ/mol  ΔH0 CO2 = −393.5 kJ/mol ΔH0…

Q: A calorimeter contains 150 g water. The calorimeter and the water inside are both at 22 °C. A piece…

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Q: Given the following thermochemical equations: NO + O3(2) NO22) + O2e) AH1 = -198.9 kJ/mol 1.5 Ozg)…

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Q: 47. Which of the following chemical equations does not correspond to a standard molar enthalpy of…

A: The standard molar enthalpy of formation is the enthalpy change of reaction in standard conditions…

Q: Given the following thermochemical equations,   NO(g) + O3(g) → NO2(g) + O2(g) ΔH = −198.9 kJ/mol…

A: The given reaction is, 2NO2(g) →2NO(g) + O2(g)   The equations for the formation of given reaction…

Q: Calculate the enthalpy change when 14.5 of water vapor condenses to a liquid

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Q: Determine the enthalpy of reaction for 2CH₄(g) → C₂H₄(g) + 2H₂(g) using the equations: 2C₂H₆(g) +…

A: Our desired equation is: 2CH₄(g) → C₂H₄(g) + 2H₂(g) ; ∆Ho = ?? In order to get the desired equation,…

Q: 13. Which represents the standard enthalpy of formation of ammonia? a)  N2(g)+ 3 H2(g) → 2 NH3(g)…

A: The standard enthalpy of formation is denoted by ∆Hf°. This term can be defined as the formation or…

Q: A 7.47 g sample of an unknown salt (MM = 116.82 g/mol) is dissolved in 150.00 g water in a coffee…

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

Q: Calculate the heat associated with the burning Mg in kJ/g.    kJ/g   (b) Calculate the heat…

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Q: 37. What is the amount of heat required to raise the temperature of a given quantity of the…

A: When we heat a substance the temperature of the substance increases. The required amount of heat to…

Q: (a) Consider the following thermochemical data to: 2CO2(g) → 2 C (s, graphite) + 2 O2 (g) AH° =…

A: The enthalpy change of an reaction is extensive property i.e on changing the stoichiometry of…

Q: Calculate the standard enthalpy of formation of solid AlCl3 from the following data: 2 Al(s) + 6…

A: Eq. 1 ⇒ remains unchanged. It gives us 2Al(s), which is what we want. The other substances will…

Q: Image attached

A: Consider the desired equation is as follows: 2NO2g→N2O4g Consider the given reactions as follows:…

Q: Calculate the standard enthalpy of formation of gaseous carbon tetrafluoride (CF4) using the…

A: We have to calculate the standard enthalpy of formation of gaseous carbon tetrafluoride (CF4) as…

Q: The work done when a gas is compressed in a cylinder is 572.0 J. During this process, there is a…

A: Change in internal energy of a system during compression of a gas can be calculated by using the…

Q: Determine the enthalpy change in the following equation: 2 NH3(g) → N2(g) + 3 H2(g) AH°f NH3(g)…

A: Chemical equation for the formation of ammonia: 1/2N2  +  3/2H2  ----->  NH3   ∆Hof = -46.11…

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

A: The enthalpy of a reaction is dependant on the stoichiometric coefficients of reactants and products…

Q: The combustion of 0.1599 g benzoic acid increases the temperature of a bomb calorimeter by 2.56°C.…

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

A: Heat of formation, also called standard heat of formation, enthalpy of formation, or standard…

Q: Using the equations N₂ (g) + 3 H₂ (g) → 2 NH₃ (g) ∆H° = -91.8 kJ/mol C(s) + 2 H₂ (g) → CH₄ (g) ∆H°…

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Q: Which of the following is/are TRUE for an endothermic process in an open or closed system? I. The…

A: We have to tell which statement is true.

Q: A gold coin whose mass is 8.75 g is heated to 121.1°C and then quickly dropped into an ice…

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Q: What amount of heat is required to raise the temperature of 250.0 g of aluminum (Al) by 40°C? The…

A: Given, Change in temperature,∆T = 40°C mass of aluminium, m = 250 g Specific heat of aluminium ,…

Q: a) N2(g) b) Ne(g) c) Na* (aq) d) Cl(g) e) He(g)

A: The energy required for formation of a compound from its constituents elements is called enthalpy of…

Q: What are the assumptions that are made when performing calorimetry to determine molar enthalpies?…

A: Calorimeter :  A calorimeter is a insulated device used for heat measurements. It mainly consists of…

Q: Which has a higher enthalpy on each set of thermochemical equation below. And why is that so?   a.…

A: Enthalpy: It is property of a system which tells about the heat content pf that system. Change in…

Q: Calculate the total enthalpy for the combustion of methane using the previous questions. O-1616…

A: Bond energy It is the energy required to dissociate 1 mole of bonds between two atoms of diatomic…

Q: en the thermochemical equation 2S02(g) + O2(g) – 2SO3(g), AH°rxn-198 kJ/mol, how much heat is evolod…

A: Answer and explanation is given below hope you like it.

Q: The combustion of 0.1587 g benzoic acid increases the temperature of a bomb calorimeter by 2.57°C.…

A: The calorimeter is used to measure the heat capacity, the specific heat capacity of the substances…

Q: Using the equations H₂ (g) + F₂ (g) → 2 HF (g) ∆H° = -79.2 kJ/mol C (s) + 2 F₂ (g) → CF₄ (g) ∆H° =…

A: It is given that the enthalpy for the reactions, H2(g) + F2(g) → 2 HF(g) ∆H° = -79.2 kJ/mol  C(s) +…

Q: A gold coin whose mass is 8.47 g is heated to 138.9oC and then quickly dropped into an ice…

A: Given: The mass of a gold coin is 8.47 g. The initial temperature of the coin is 138.9°C. The molar…

Q: 4. Given the thermochemical equations: Cigraphite) + Oze) > CO29) AH = -393.3 kJ/mol > Cdiamond) AH…

A: The balanced chemical equation with thermodynamic data provided is known as a thermochemical…

Q: The combustion of 0.1559 g benzoic acid increases the temperature of a bomb calorimeter by 2.52°C.…

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Q: 67. Calculate the standard molar enthalpy of formation of NO(g) from the following data:…

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Q: Given the following equations:                4 NH3(g) + 5 O2(g) → 4 NO(g) + 6 H2O(l)   ΔH° = -1170…

A: Hess’s Law applies to the change in enthalpy that occurs when some reactants are converted to…

Q: Which pack had the greatest change in enthalpy? How do you know?

A: Assuming that the material present inside both the packs are of the same specific heat as it is not…

Q: When one mole of calcium carbonate reacts with ammonia, solid calcium cyanamide, CaCN2 and liquid…

A: The enthalpy of formation (ΔHf°) is the standard reaction enthalpy (ΔH°) for the production of the…

Q: 2. A 4.348 g sample of NaOH(s) is dissolved in 100. g of water in a calorimeter, the temperature…

A: In this question we have to calculate the heat of Reaction by the given data of the calorimeter.

Q: Use the following thermochemical equations as needed to find the heat of formation of diamond.…

A: Given equations are : 1). C (diamond) +  O2 (g)  --------> CO2 (g) , ΔH1 = -395.4 KJ  2). 2CO2…

Q: Determine the enthalpy change for the reaction: SO3 (g) + H20(g) → H2SO4 (1) Given: i. H2SO4 (1) →…

A: Given    H2SO4(l)     →  H2S(g)    +  2O2(g)                            ∆H  =  1236.4 KJ  SO3(g)   +…

Q: 1. 50.0 g of water are added to a calorimeter at 22.35°C. An additional 50.0 g of water are heated…

A: 1. The energy difference of the heat energy gained by cold water and the heat energy lost by hot…

Q: enthalpy change

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Q: The combustion of 2.41 g of butane (C4H10) in a calorimeter causes a rise in temperature of 12.1°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.