Consider

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

A: The given chemical reactions are as follows:

Q: Using the equations 2 CH, (1) + 15 0, (g) → 12 CO, (g) + 6 H,O (g)AH° = -6271 kJ/mol C (s) + O, (g)…

A: Above question will be solved by suing the Hess Law.

Q: Given the standard enthalpy changes for the following two reactions: (1) 2Ni(s) + O2(g)–→2N¡O(s) AH°…

A: According to Hess's law change of enthalpy in a chemical reaction is same regardless of whether the…

Q: According to Hess's law, what will be the total change in enthalpy for the reaction: C(s, diamond)…

A: According to Hess's law change of enthalpy in a chemical reaction is same regardless of whether the…

Q: A scientist measures the standard enthalpy change for the following reaction to be -18.4 kJ: Ca(OH)2…

A: From the Given:∆Hf° (CaCl2(s)) = -795.8 kJ/mol∆Hf° (H2O(l)) = -285.8 kJ/mol∆Hf° (Ca(OH)2(aq)) =…

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

A:

Q: 1. Calculate the enthalpy of reaction for the combustion of methane gas, CH4, to form CO,(g) +…

A: In this question, we want to Calculate tye Enthalpy of the combustion Reaction for methane. You can…

Q: Determine the enthalpy of reaction for HCI(g) + NaNO2(s) → HNO2(1) + NaCl(s) 2NACI(s) + H2O(1) →…

A:

Q: Given the standard enthalpy changes for the following two reactions: (1) 2Fe(s) + O2(g) → 2FeO(s) ΔΗ…

A:

Q: PCIS(s) can be prepared by the reaction PCla(l) + Cl2(g) PCls(s). Calculate the enthalpy change (in…

A: delta H is an extensive property....

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

A:

Q: The standard enthalpy change for the following reaction is 450 kJ at 298 K Cu(OH)2(s) → Cu(s) +…

A: Given:

Q: The standard enthalpy change for the following reaction is 265 kJ at 298 K. Hg,Cl2(s) →2 Hg(1) +…

A:

Q: Given the following reactions N₂ (g) + 202 (g) → 2NO₂ (g) AH = 66.4 kJ 2NO(g) + O2 (g) → 2NO₂ (g) AH…

A:

Q: Calculate the standard enthalpy of formation, AHf°(in kJ mol-1), of solid MgO, given the following…

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.