A scientist measures the standard enthalpy change for the following reaction to be -340.6 kJ: 2Na(s) + 2H₂O(l) → 2NaOH(aq) + H₂(g) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of H₂O(l) is Species AH (kJ/mol) NaOH(aq) -470.1 H₂(g) 0.0 Na(s) 0.0 kJ/mol.

Q: Calculate the enthalpy of reaction (ΔHrxn), in kJ, for the following reaction: Fe2O3(s) + 3 CO(g) →…

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

Q: The enthalpy change for the reaction of hydrogen gas with fluorine gas to produce hydrogen fluoride…

A: The formation of hydrogen fluoride from hydrogen gas and fluorine gas is expressed as, H2g+F2g→2HFg…

Q: Use Hess' Law to calculate the enthalpy change (in kJ) for the reaction: NO(3) + O(g) → NO2(3) from…

A: Enthalpy change is a state function and depends on initial and final states of the system. It is…

Q: Use the standard reaction enthalpies given below to determine ΔH°rxn for the following reaction:…

A:

Q: A scientist measures the standard enthalpy change for the following reaction to be -138.8 kJ : H2(g)…

A: The given reaction is as follows: H2(g)+C2H4(g) → C2H6(g) The standard enthalpy change for the…

Q: A scientist measures the standard enthalpy change for the following reaction to be -168.0 kJ:…

A: The given equation is, NH4NO3aq→N2Og+2H2Ol The standard enthalpy formation is -168.0 kJ.

Q: Calculate the standard enthalpy change for the following reaction at 25 °C.…

A: If the reaction between the species acid and base than the salt and water will be generated.

Q: Given the standard enthalpy changes for the following two reactions: AH = -325.1 kJ (1) Sn(s) + Cl₂…

A: We have to predict the standard enthalpy change for given reaction.

Q: The enthalpy of a system can be written as H = U + PV. Show that the enthalpy change AH can express…

A: A question based on chemical thermodynamics that is to be accomplished.

Q: A scientist measures the standard enthalpy change for this reaction to be -1149.8 kJ/mol. 2H,S(g) +…

A: Consider the given reaction is as follows; 2 H2S g     +   3 O2g     →    2 H2Ol   +   2 SO2g…

Q: Pentane (C5H12) is a component of gasoline  that burns according to the following balanced equation:…

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: Given the standard enthalpy changes for the following two reactions: (1) 2Pb(s) + O2(g)2P6O(s) AH =…

A: Interpretation-  To determine the enthalpy change for the given reaction which is given as -…

Q: A scientist measures the standard enthalpy change for the following reaction to be -136.5 kJ : NH,NO…

A: GivenNH4NO3 (aq) → N2O (g) + 2H2O(l)∆Hreaction = -136.5 kJ/mole

Q: A scientist measures the standard enthalpy change for the following reaction to be -14.6 kJ :…

A: The expression for the enthalpy change is:

Q: A scientist measures the standard enthalpy change for the following reaction to be -1152.8 kJ:…

A:

Q: The standard molar enthalpy of formation of diborane, B2H6(g), cannot be determined directly because…

A: (a).

Q: Calcium hydroxide, which reacts with carbon dioxide to form calcium carbonate, was used by the…

A: The given balanced chemical reaction is  Ca(OH)2(aq)  +  CO2(g)  → CaCO3(s) + H2O(g). Given data…

Q: The oxidation of sulphur dioxide to sulphur trioxide is important in the manufacture of sulphuric…

A:

Q: Palmitic acid (C16H32O2) is a dietary fat found in beef and butter. The caloric content of palmitic…

A: The combustion of palmitic acid is given as follows: C16H32O2 (s) + 23 O2 (g) → 16 CO2 (g) + 16 H2O…

Q: the standard enthalpies of fo

A:

Q: A scientist measures the standard enthalpy change for the following reaction to be 80.1 kJ:…

A: Solution- ∆Hreaction=2∆HofFe2O4+∆Hof(H2O)- 3∆HofFe2O4+∆Hof(H2)∆Hreaction=2∆HofFe2O4+(-241.818kJ)-…

Q: The standard enthalpy change for the following reaction is -467 kJ at 298 K. Na(s) + 1/2 N2(g) + 3/2…

A:

Q: A scientist measures the standard enthalpy change for the following reaction to be -52.7 k) :…

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: A scientist measures the standard enthalpy change for the following reaction to be -1057.0 kJ :…

A:

Q: I am confused on how to find the enthalpy change with this information. Thank you!

A: Enthalpy of formation of a pure compound will be zero. So the formation enthalpy for oxygen will be…

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

A: Endothermic reaction: When the heat energy was absorbed by the system from the surrounding is called…

Q: A scientist measures the standard enthalpy change for the following reaction to be -57.0 kJ:…

A: Given balanced chemical equation,  Ca(OH)2(aq) + 2 HCl(aq) → CaCl2(s) + 2 H2O(l) The enthalpy change…

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

A:

Q: standard enthalpy of formation

A:

Q: Given the standard enthalpy changes for the following two reactions: (1) Hg(1) + Cl,(g)→HgCl,(s) AH°…

A: The reactions given are,

Q: What is the standard enthalpy change for the reaction:  2PbCl2 (s) + O2 (g) --> 2PbO (s) + 2Cl2 (g)…

A: The standard enthalpy change of the reaction can be calculated with the help of the given two…

Q: The hypothetical element X and an oxide of X undergo the following reactions with oxygen, with the…

A: Answer: -150 KJ  Solution:

Q: A scientist measures the standard enthalpy change for the following reaction to be 184.8 kJ:…

A:

Q: A sample of NaOH (MM = 40.00 g/mol) with a mass of 1.811 g was added to a solution of HNO3 in a…

A: •Given:- NaOH => Molar mass= 40.00 g/mol                                 Weight=1.811 g…

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.