reactions as endothermic or exothermic a. Ca, + Caa CaCla b. H:O + CO2 → H:COac) c. BaC + Na:SO → BaSO + 2 NaCl d. Mg,+2 HOClas → MgClaeo + H:a e. NO: > NO + % Op AH°25°C = -795 kJ AH°25°C = 19 kJ AH°25°C = -593 kJ AH°25°C = -462 kJ AH°25°C = 57 kJ

Q: New August 4 2021. A solution of Au- ore is prepared by digestion the ore sample with ------ to…

A: Gold is a very inert metal and does not dissolve easily.

Q: What is AG° for the reaction CH;OH(g) → CO(g) + 2 H2(g) at 25°C? AH° = +90.7 kJ/mol AS° = +221…

A: Gibbs free energy is related to enthalpy change and change in entropy at constant temperature as,…

Q: Consider the following hypothetical reaction: A + B + heat ⇌ C + D How will the following change…

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

Q: Determine Kg expression of the following reactions: 1.) co,?-(aq)+ H*(aq) = HCO,-(aq) 2.) HCO3¯(aq)…

A: Let, Reaction 1:    A + B ⇔ C           K1 Reaction 2:    C + A ⇔ D          K2 So the overall…

Q: Although the process of dissolution of helium gas in wateris favored in terms of energy, helium is…

A: The process in which the substance in gaseous, solid or in liquid phase dissolves in the specified…

Q: Given the reactions, X(s)+12O2(g)⟶XO(s) Δ?=−635.1 kJ XCO3(s)⟶XO(s)+CO2(g)…

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

Q: What is K for a reaction if ∆G° =-269.9 kJ/mol at 25°C? (R = 8.314 J/mol ･ K)

A: Answer :-  K = 2.0 × 1047 the equilibrium constant, K for the reaction = 2.0 × 1047…

Q: Which statement best describes the reaction (s) + 4HCI, at a low temperature of 25 °C that has AH°=…

A:

Q: Fe3+(aq) + SCN–(aq) FeSCN2+(aq) Is the reaction exothermic or endothermic as written? Explain.

A: If energy released in a reaction then reaction classified as exothermic reaction. And if energy…

Q: A generic salt, AB2, has a molar mass of 287g/mol and a solubility of 2.80 g/L at 25 °C.…

A: Solubility product(Ksp) is the product of molar concentrations of ions (mol/L) of sparingly soluble…

Q: 6.1 The solubility of aluminum hydroxide (Al(OH)3) is approximately 1.8 x 10-9 Mat a specific…

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

Q: Consider the reaction: A + B. When this reaction reaches equilibrium, which quantity equals zero?…

A: Equlibrium is the state of a reversible reaction when the two opposing reactions occurs at the same…

Q: Determine the AH of the reaction 1 1 NO29) + 702c9) +5H20(9) → HNO3(aq) 4 AH = 33.2 kJ 5 N2c9) +…

A:

Q: A reaction X is exergonic and endothermic under standard conditions; what must be true of X under…

A:

Q: . Does your answer agree with what you would predict based on bond energies?  Explain.

A: The nature ie endothermic or exothermic of a chemical can be determined by calculate bond energy of…

Q: What is K for a reaction if ∆G° =-176.5 kJ/mol at 25°C? (R = 8.314 J/mol ･ K)

A: The change in Gibbs free energy can be expressed at 298 K as follows-

Q: वक् A law for the reactions

A:

Q: Which is the best method for carrying out the following reaction? COOH SO3H O +COOH; then SO3/H2SO4…

A:

Q: SnO2(g) + 2C(s) = Sn(s) + 2CO2(g) AH =+ 360.0 KJ Pressure is decreased N2(g) + 3 H2(g) 22 NH3(g) 4H…

A: a) system change  result  explanation SnO2(g)+2C(s)⇋Sn(s)+2CO2(g) ∆H=+360Kj Pressure is…

Q: CH.(g) + H;O(g) → CO(g) + 3H2(g) representation to the right shows a pr nydrogen forming reaction…

A: Given reaction is:- CH4 + H2O ----> CO + 3H2 What is given that in product there is 6moles of H2…

Q: The solubility product of solid copper(II) hydroxide is 2.2 x 10−20 g/L in water at 298 K. What is…

A: Given :- Ksp of Cu(OH)2 =  2.2 x 10−20 g/L  To calculate :- Its solubility (g/L)

Q: Consider the reaction: Cl2(g)+3F, (g)–→2CIF;(g) A[Cl2]/At = -0.093 M/s

A: Rate of a chemical reaction :- The decrease in concentration of reactants with time or increase in…

Q: What is K for a reaction if ∆G° =-292.8 kJ/mol at 25°C? (R = 8.314 J/mol ･ K)

A: Interpretation: The value of K for a reaction, if ∆G° = -292.8 kJ/mol at 25°C is to be determined.

Q: Predict the signs of Delta H for the reaction below: 4NO(g) + 6H,0(g) --> 4 NH,(g) + 50. (g) AH > 0…

A:

Q: 1/2 Cl2 (g) -><- Cl (g) The reaction Gibbs free energies at various temperatures are given. A)…

A: The Gibbs free energy describe the spontaneity of a reaction, if its value is negative, reaction…

Q: Using the information in the table below, calculate the value of the equilibrium constant (K) for…

A: Given,

Q: In the following reaction calculate and find the normality when it is 1.0 M H3PO4? H3PO4 + 2NaOH →…

A: Given: Molarity of H3PO4 = 1.0 M

Q: Calculate the AGᵒrxn using the following information at 25 °C 7 N₂(g) + H₂O(1) HNO3(g) + N₂H4(1)…

A:

Q: 436.4 kJ/mol H2(g) → 2H(g) Br2(g) → 2Br(g) H2(g) + Br2(g) ΔΗ ΔΗ 192.5 kJ/mol 2HBr(g) AH° = –72.4…

A: H(g) + Br(g) ---&gt; HBr(g)

Q: find the pH.

A: This is question with multiple subparts. So, according to bartleby guidelines I need to solve only…

Q: What would be the equilibrium temperature if you drop 5.0 g of brass (Cp = 0.38 J/g-oC, initially at…

A: The equilibrium temperature can be calculated as follows:

Q: Consider the reaction at 25 degrees celsius 2NO3-(aq)+8H^+(aq)+3Cu(s)=3Cu2+(aq)+2NO(g)+4H2O(l)…

A: Applying the Nernst Equation for the given cell reaction:

Q: What is K for a reaction if ∆G° =-273.8 kJ/mol at 25°C? (R = 8.314 J/mol ･ K)

A: Standard Gibbs free energy is related with Equilibrium constant,K as - ∆G° = - RT ln K   Where - ∆G°…

Q: 2. Calculate the AH for the reaction S 2(g) using these two reactions: + Oe So, AH = -296.8 kJ 2(g)…

A:

Q: Which of the following processes is endothermic?   K+(g) + I-(g) → KI(s) 2Br(g) → Br2(g) 2Na(s) +…

A: Endothermic process is that process in which energy is absorbed.

Q: Determine AG for the reaction: 2C0(g) + 2H2(g)→ CO2(g) + CH4(g) AH = -247.3 kJ/mol ASO = -256.5…

A:

Q: At 400° C, Kc= 0.500 for the reaction N2 (a) + 3H2 (a) 2NH3(g) AH= -91.8 kJ If the reaction…

A: To solve this problem we need to calculate reaction quotient. aA + bB -----&gt; cC + dD Qc =…

Q: What is DH°rxn (in kJ) for the reaction - CH4(g) + 202(g) · CO2(g) + 2H20(1). --> DH°f (CH4(g))…

A:

Q: 2. _H,O, heat +_0+Ho B. Addition of water? C. Removal of dioxide? A. Removal of heat? D. Increase…

A: Balanced equation: 2H2O(l) + ∆ ⇋ O2(g) + 2H2(g) According to Le Chatlier's principle: If there is…

Q: The AG for the following reaction is -100.4 k). C2H4(g) + H2(g)--> C2H6(g) Given AG*, [C2H4(g)] =…

A: For a general reaction                                               aA + bB → cC   + dD ∆G°rxn  =(…

Q: 12. For the reaction Cl,0(g)+%O2(g) → 2C10, (g), AH° = 126.4 kJ/mol and AS° =-74.9 J/K mol. At…

A: Given Data:

Q: Complete the following reaction scheme. A H H,0, H,O* HBr, H,02 Br, H,0 conc. H,SO, H;C- CH3 G H,,…

A: Since you have posted question with multiple sub-parts, we are entitled to solve the first 3 only.…

Q: Which of the following shows the reaction associated with the standard hear of formation of a…

A: Rules for standard heat of formation:The reactants should be elements in their standard state.Only…

Q: Determine ΔSºrxn for the reaction: CaCO3(s) → CaO (s) + CO2 (g)

A: Given :  CaCO3(s) → CaO(s) + CO2(g)  S°(CaCO3(s)) = 92.9 (J/mol-K) S° (CaO(s)) = 213.6 (J/mol-K)…

Q: Identify change in physical state if applicable. Indicate if energy (heat) must be added or remored.…

A:

Q: Consider the reaction: 4A + B= 2C.        Δ H=-443.6Kj/mol what reaction corresponds to a H of…

A: The given reaction is as follows: 4A + B= 2C................. Δ…

Q: Con‎sider follo‎wing reaction: ‎ (s) ->  Hg(l)  + ½ O2 (g)  DH = +90.7 kj/mol. Which of the…

A: Entropy of a system can be defined as degree of randomness of that system. Exothermic reactions…

Q: Is the reaction endothetmic or exothermic？Fe3+(aq) + HSCN (aq) ↔ FeSCN2+(aq) + H+ (aq)

A: The reaction is: Fe3+(aq) + HSCN (aq) ↔ FeSCN2+(aq) + H+ (aq)

Q: Calculate K given E0cell= 0.00620 volts T=721 n= 2 R= 8.314 J/mol K F= 96500 C/mole electrons

A: Given: E0cell = 0.00620 V T = 721 K n = 2 R= 8.314 J/mol K F = 96500 C/mole electrons

Q: Is the following chemical reaction exothermic or endothermic? 31 (aq) + H3AS04(aq) + 2H* (aq) 13…

A: Answer: The chemical reaction is endothermic.

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.