Calculate the ΔHo for the reaction, 6NO2(g) + 8NH3(g) → 7N2(g) + 12H2O(l).   N2(g) + 2O2(g) → 2NO2(g)   ΔHo=+66.36 kJ 4NH3(g) + 3O2(g) → 2N2(g) + 6H2O(l)   ΔHo=-1530.36 kJ

Q: Consider the reactions N2H4(l) + CH4O(l) → CH2O(g) + N2(g) + 3H2(g) ΔH = 80 kJ/mol N2(g) + 3 H2(g) →…

A: As per the given data We need to fing the overall ∆H for the above reactions which can be shown as…

Q: The standard enthalpy change for the following reaction is 986 kJ at 298 K. Ca(OH)2(9) → Ca(s) +…

A: The given reaction is  Ca(OH)2 -------> Ca(s) + O2(g) + H2(g)  Delta H = 986 kl/mol

Q: Calculate ΔH for the reaction P4O10(s) + 6PCl5(g) → 10Cl3PO(g) given, P4(s) + 6Cl2(g) → 4PCl3(g)…

A: Let,P4(s) + 6Cl2(g) → 4PCl3(g) ΔH1 = –1225.6 kJ    -----1 P4(s) + 5O2(g) → P4O10(s) ΔH2 = –2967.3 kJ…

Q: Calculate Δ Hrxn for  Ca(s) + 1/2 O2(g) + CO2(g) → CaCO3(s)   given the following set of reactions:…

A: Given :  Ca(s) + 1/2 O2(g) →CaO(s)  ΔH = −635.1 kJ CaCO3(s) →CaO(s) + CO2(g)  ΔH = 178.3 kJ    To…

Q: Calculate ΔHrxnΔHrxn for the following reaction: CH4(g)+4Cl2(g)→CCl4(g)+4HCl(g) given these…

A: The reactions given are, 1) C (s) + 2 H2 (g) → CH4 (g)…

Q: Calculate the standard enthalpy change for the reaction 2C8H18(l) + 21O2(g) → 8CO(g) + 8CO2(g) +…

A: To find :  2C8H18(l)+21O2(g)→8CO(g)+8CO2(g)+18H2O(l)…

Q: From the following enthalpies of reaction: H2(g)+F2(g)→2HF(g),ΔH=−537kJ…

A: H2(g)+f2(g)-> 2hf(g) triangle h=-537 kj C(S)+2f2 (g) àcf4 (g)  triangle h=-680 kj eqn2…

Q: Calculate ΔHrxn for the following reaction: CaO(s)+CO2(g)→CaCO3(s) Use the following reactions and…

A: Required reaction:  CaO(s) + CO2 (g) → CaCO3(s)

Q: From the enthalpies of reaction: 2 C(s) + O2(g) → 2 CO(g) ΔH =…

A:

Q: Calculate the enthalpy change for the reaction C2H2(g) + 2H2(g) → C2H6(g)     ΔrH = ? from the…

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

Q: Find the ΔH (in kJ) for the reaction: PCl3(l)  +  Cl2(g)  →  PCl5(s)   Given: 2 P (s)  +  3…

A: According to hess’s law :- When reactants are converted to products the chage in enthalpy is same…

Q: CH3OH (l) + 3/2 O2 (g) → CO2 (g)  + 2 H2O (l), ΔH = -726.4 KJ/mol C (graphite) + O2 (g)  → CO2 (g),…

A: Given reactions are  1) CH3OH (l) + 3/2 O2 (g) → CO2 (g)  + 2 H2O (l),…

Q: Given the following reactions:             N2(g) + 2O2(g) → 2NO2(g)      ΔH = 66.4 kJ…

A:

Q: 4NH3(g) + O2(g) → 2N2(g) + 6H2O(g)          ΔrH = -1267 kJmol-1  2NO(g) + O­2(g) → 2NO2(g)     ΔrH…

A: For a chemical reaction to be spontaneous, Gibbs free energy, ∆rG should be negative. ∆rG is…

Q: 1. Find the enthalpy of reaction ΔrHo for  the following reaction :  2 S(s) + 3 O2(g) → 2 SO3(g).…

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

Q: Given the following reactions:             N2(g) + 2O2(g) → 2NO2(g)      ΔH = 66.4 kJ…

A: • The desired equation is,       N2(g) + O2(g) → 2NO(g) ; ∆H= ??    • The given thermochemical…

Q: Consider the following reactions:                  C2H6 (g)  +  7/2 O2 (g)  →  2 CO2 (g)  +  3 H2O…

A:

Q: 1) Given C(s) + O2 (g) → CO2 (g) ΔH= +393.5 kJ S(s) + O2 (g) → SO2 (g) ΔH= +296.8 kJ What will be…

A: Given data 1) GivenC(s) + O2 (g) → CO2 (g) ΔH= +393.5 kJS(s) + O2 (g) → SO2 (g) ΔH= +296.8 kJWhat…

Q: Find the AH for the reaction below, given the following reactions and subsequent AH values: N2H4(1)…

A:

Q: Calculate the enthalpy change for the reaction: C2H4(g)  +  H2(g)  →  C2H6(g) C2H4(g)  +…

A:

Q: The standard enthalpy change for the following reaction is -851 kJ at 298 K. 2 Na(s) + O2(g) +…

A:

Q: Calculate ΔH (in kJ/mol) for the reaction shown below: ClF(g)+F2(g)→ClF3(g) Use the following…

A:

Q: 1. Calculate the enthalpy for this reaction: 3NO 2 (g) + H 2 O(ℓ) ---> 2HNO 3 (aq) + NO(g) given…

A: Given reactions are : 1). 2NO (g) + O2 (g) -----------> 2NO2 (g),  ΔH1o = ─ 116 kJ2). 2N2 (g) +…

Q: enthalpy change for the reaction 2C8H18(l) + 17O2(g) → 16CO(g) +

A: According to Hess's law we can treat thermodynamic equations like algebraic equations i. e. We can…

Q: Consider the reactions 2 K2O(s) + O2(g) → 2 K2O2(s) ΔH = -265 kJ 8 KO2(s) → 4 K2O(s) + 6 O2(g) ΔH =…

A: The enthalpy of any reaction is an additive property. So if the enthalpy of two or more reaction is…

Q: Use the example shown to calculate the reaction enthalpy, ΔH, for the following reaction:…

A:

Q: CH3OH (l) + 3/2 O2 (g) → CO2 (g)  + 2 H2O (l), ΔH = -726.4 KJ/mol C (graphite) + O2 (g)  → CO2 (g),…

A: Hess’s law of constant heat summation- Change in enthalpy for a reaction is independent on path or…

Q: Calculate the enthalpy of reaction, ΔHrxn, for 2SO2(g) + O2(g) → 2 SO3(g) Given, S(s) + O2(g) →…

A: Given, S(s) + O2(g) → SO2(g) ΔH= −299 kJS(s) +3/2O2(g) → SO3(g) ΔHsol= −395 kJ Calculate the…

Q: Calculate ΔH for the following reaction, CaO(s) + CO2(g) → CaCO3(s) given the thermochemical…

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

Q: Find the ΔH (in kJ) for the reaction: PCl3(l)  +  Cl2(g)  →  PCl5(s)   Given: 2 P (s)  +  3…

A: In this question, we have to use Hess’s law. It states that the enthalpy change for the overall…

Q: Calculate ΔH for the following reaction: 4 Cu(s) + 2 NO2 (g) → 4 CuO(s) + N2(g) Given the following…

A:

Q: Calculate Δ­H for the reaction  NO(g) + O(g) → NO2(g) given the following information: NO(g) +…

A: Introduction The value of heat of reaction can be calculated by the application of Hess's Law.

Q: Calculate the enthalpy of the reaction (ΔH) for the following reaction:…

A: The enthalpy of the desired reaction can be determined using Hess’s Law. It states that the enthalpy…

Q: The standard enthalpy change for the following reaction is 561 kJ at 298 K. Cd(OH)2(s) → Cd(s) +…

A: Cd(OH)2 (s)  -----> Cd(s) + O2(g)  + H2(g)   ∆Ho1 = 561 kJ   ........................(1) Cd(s) +…

Q: What is the enthalpy change for the first reaction? Fe2O3(s) → 2Fe(s) + 3/2O2(g) ΔH =  4Fe(s) +…

A:

Q: What is the enthalpy change for the first reaction? CH4(g) + 1/2O2(g) → CH3OH(g) ΔH =

A:

Q: Find the ΔH for the reaction below, given the following reactions and subsequent ΔH values: C3H8(g)…

A: Using Hess's law,  Enthalpy of reaction remains constant whether it completes in single step or more…

Q: From the following enthalpies of reaction: 2 H2(g) + O2(g) → 2 H2O(l)…

A:

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.