1. Write and balance the chemical equation where KOH and HCL reacts.

Q: The standard enthalpy change for the following reaction is -496 kJ at 298 K. 2 K(s) + O2(g)…

A: Introduction :  We need tell the enthalpy change for the reaction when reaction get reversed . Given…

Q: Given the standard enthalpy changes for the following two reactions: (1) Hg(1) + Cl½(g)–→HgCl½(s)…

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

Q: For reaction 3A + 2B → A3B2 ArtH= 745.1 kJ/(mol rxn) "A" molar mass = 271.1 g/mol; "B" molar mass=…

A: Given reaction:  3A + 2B → A3B2 Molar mass of A = 271.1 g/mol. Molar mass of B = 39.2 g/mol. No of…

Q: Consider the following reactions: 3C(s) +4H,(g)→C;H,(g) AH° =-103.8kJ C(s) +0,(g)→ CO,(g) AH'…

A: Hess’s law- Change in enthalpy for a reaction is independent on path or steps followed by reaction.…

Q: Using the Table of Thermodynamic Values, determine the change in enthalpy (kJ) for the following…

A: Hess's law  states that the amount of heat evolved or absorbed in a process is independent of the…

Q: Deterioration of buildings, bridges, and other structures through the rusting of iron costs millions…

A: Consider the given reaction of iron rust is as follows; Reaction:       4 Fe s       +     3 O2 g…

Q: Given the standard enthalpy changes for the following two reactions: (1) 2Hg(l) + O2(g) ->…

A: ΔH° =  267 kJ

Q: 9. From the enthalpies of reaction 2C (s) + O2 (g) → 2 CO (g) AH = -221.0kJ 2C (s)+ O2 (g) + 4H2 (g)…

A: Given: The two thermochemical reaction is as follows: 2C(s) + O2(g) -------> 2CO(g)…

Q: When a 2.00 g2.00 g sample of RbBrRbBr is dissolved in water in a calorimeter that has a total heat…

A: Given, Mass of sample RbBr = 2.00gram Total heat capacity = 0.779 KJ-1K-1 Temperature is decreased…

Q: Given the reactions, X(s)+1/2 O2(g)⟶XO(s)   Δ?=−613.7 kJ XCO3(s)⟶XO(s)+CO2(g) Δ?=+148.1 kJ what is…

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Q: A 10.0 g solution of 0.05000 M aqueous NaOH was neutralized in a foam cup calorimeter with 10.0 g of…

A: Given: Mass of NaOH = 10.0 g Concentration of NaOH=0.0500 M Mass of HCl = 10.0 g Concentration of…

Q: Given the standard enthalpy changes for the following two reactions: (1) N2(g) +…

A: The given problem relates to Hess's law, which states that the amount of heat evolved or absorbed in…

Q: Calculate the standard enthalpy change for the reaction at 25 ∘C HCl(g)+NaOH(s)⟶NaCl(s)+H2O(l)…

A: Enthalpy of a system is the sum of interna energy and product of pressure and volume. Total heat…

Q: 1)State the First Law of Thermodynamics.

A: (1) First law of thermodynamics -  According to first law of thermodynamics " Energy can not be…

Q: Using the following reactions: 2 H 2 (g) + O 2 (g) --> 2 H 2O (g) ∆H = –484 kJ x 2…

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Q: Calculate the reaction enthalpy, ΔH, for the following reaction:     CH4(g)+2O2(g)→CO2(g)+2H2O(l)…

A: As per the question, given reactions are mentioned below:

Q: In each of the following cases, determine the sign of DH, state whether the reaction is exothermic…

A: When the molecules react with each other, there would be the formation of new bonds. There will also…

Q: Illustrate the strategy for estimating reaction enthalpies?

A: The enthalpy of a system is defined as the sum of its internal energy U and the product of its…

Q: Consider the following reactions: (1) N2(g) + O2(g) → 2NO(g) AH = +180.7 kJ (2) 2NO(g)+ O2(g)…

A: Dear student I have given answer to your question in the image format.

Q: Calculate the standard enthalpy change for the reaction at 25 ∘C Standard enthalpy of formation…

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Q: What is Hess’s law? When a reaction is reversed, what happens to the sign and magnitude of Delta H…

A: The enthalpy change is a state function and the Hess law states that the change of enthalpy in a…

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

A: Given: ∆HfoFe2O3s=-824.2 kJ/mol∆HfoH2g=0 kJ/mol∆HfoFes=0 kJ/mol∆HfoH2Ol=-285.8 kJ/mol

Q: For the reaction Mg²+ + Cu (s) Mg (s) + Cu²“, K = 10ʻ9² and ASº = +18 J/(K-mol). 2. %3D Under…

A: You can see that this reaction is not favorable in forward direaction because if Mg metal is more…

Q: Using the following reactions: NO (g) + 0.5 O 2 (g) --> NO 2 (g)             ∆H = 50 kJ x    N 2O 4…

A: Determine  the enthalpy change of the given reaction.

Q: Use the data in Thermodynamic Properties to determine ΔH° for each of the following reactions.…

A: We have to find the ∆H° for the given reaction using thermodynamics relations., For a chemical…

Q: What mass of aluminum metal would absorb 250.0 kJ when it melted at its melting point? The molar…

A: One gram of aluminium metal absorbs 396.6 Joule heat.

Q: Calculate q (kJ) for the conversion of 2.95 grams of solid aluminum oxide into aluminum and oxygen?…

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Q: Silver (Ag, 107.9 g/mol) oxidizes to form Ag2O (231.7 g/mol).  The molar heat of formation (ΔHfo) of…

A: Given (ΔHf ) of silver oxide = –31.05 kJ/mol. Molar mass of Ag = 107.9 g/mol Molar mass of Ag2O =…

Q: Copper has been used for thousands of years, either as a pure metal or in alloys. It is frequently…

A: Enthalpy change for the reaction recovering1.23 mol Cu is determined as follows,

Q: c) In an experiment, 15.3g of sodium nitrate were dissolved in water in a calorimeter and the…

A: The reaction taking place in calorimeter is endothermic in nature because heat needed to carried out…

Q: Using the Table of Thermodynamic Values, determine the change in enthalpy (kJ) for the following…

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Q: Consider the following reaction: 2 Mg(s) + O2(g) --> 2 MgO(s)      ΔH = - 1204 kJ/rxn   Is this…

A: In an exothermic reaction heat is evolved in the surroundings and the container becomes hot after…

Q: Calculate the standard enthalpy change for the reaction at 25 °C. Standard enthalpy of formation…

A: Given, Mg(OH)2(s) + 2HCl(g) ➝ MgCl2(s) + 2H2O(g) Temperature (T) = 25°C Species   standard enthalpy…

Q: State the First Law of Thermodynamics.

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Q: Calculate the standard enthalpy change for the reaction at 25 °C. Standard enthalpy of formation…

A: The standard conditions are:  Product ∆Hf KJ/mol Mg(OH)2 s   -924.7 HCl(g) -92.5 Mg(Cl)2 s…

Q: 302(g) → 203(g) Given the following information: AH,xn +285 kJ ASxn -137 J/KI (Enter your answer to…

A: ∆G = ∆H - T ∆S For exothermic reaction: ∆H = +ve for endothermic reaction ∆H = -ve for exothermic…

Q: The reaction N2(g) + 3H2(g) 2 2NH3(g) has K, = 6.9 × 105 at 25.0 °C. Calculate AG° for this reaction…

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Q: Part of the industrial recovery of elemental zinc from the zinc sulfide ore is by roasting: ZnS) +…

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Q: Determine ΔH for the third reaction from the information given.   C3H8(g) + 3 H2O(g) ↔ 3 CO(g) + 7…

A: Calculating ∆H for the given reaction by multiplying second reaction by 3 and adding to reaction 1.

Q: A mercury mirror forms inside a test tube by the thermal decomposition of mercury(II) oxide. 2…

A: Given :-  2 HgO(s) 2 Hg(l) + O2(g)  Hrxn = 181.6 kJ  To calculate :-  Heat require to decompose 546…

Q: Using enthalpies of formation, calculate the standard change in enthalpy for the thermite reaction:…

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Q: Describe how temperature change, both positive and negative, is a determinant of heat.    2.) If a…

A: these are multiple question . I solve first one only other part upload seperately. Thankyou

Q: Given the standard enthalpy changes for the following two reactions: (1) 2Ni(s) + 02(g)→2N¡O(s) AH°…

A: Given, 1) 2Ni(s) + O2(g) ➝ 2NiO(s)    ∆H° = -479.4 kJ 2) 2Hg(l) + O2(g) ➝ 2HgO(s)  ∆H° = -181.6 kJ…

Q: 1. The standard enthalpy changes for the formation of aluminium oxide and iron (III) oxide are 2…

A: Note : Since you have posted multiple questions, we are entitled to answer the first only. Please…

Q: A.) Given the standard enthalpy changes for the following two reactions: (1) 2Ni(s) + O2(g)2NI0(s)…

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Q: Ethylene glycol, used as a coolant in automotive engines, has a specific heat capacity of 2.42…

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Q: Iron can be extracted from the iron(III) oxide found in iron ores (such as haematite) via an…

A: Since Carbon is in excess so all the fe2o3 will be converted into Fe so using the stoichiometric…

Q: (b) What is the specific enthalpy of combustion of ethane? kJ/g. 3 sig. number.

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Q: Mg(s) + 2 H2O(l) ⟶ Mg(OH)2(s) + 2H2(g) | ∆Hrxn = —353.0 kJ/mol Calculate the number of grams of Mg…

A: Mg(s) + 2 H2O(l) ⟶ Mg(OH)2(s) + 2H2(g) | ∆Hrxn = —353.0 kJ/mol  99 mL of water temperature change =…

Q: The standard enthalpy change for the following reaction is 1.11×103 kJ at 298 K. 2 BaO(s)2 Ba(s) +…

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States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates). 

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.