Fox News – Breaking News Updates

latest news and breaking news today

Calculate the enthalpy of the reaction 2NO(g)+O2(g)→2NO2(g) - Home Work Help

source : learncbse.in

Calculate the enthalpy of the reaction 2NO(g)+O2(g)→2NO2(g) – Home Work Help

Part ACalculate the enthalpy of the reaction2NO(g)+O2(g)→2NO2(g)

given the following reactions and enthalpies of formation:12N2(g)+O2(g)→NO2(g), ΔH∘A=33.2 kJ12N2(g)+12O2(g)→NO(g), ΔH∘B=90.2 kJ

Express your answer with the appropriate units.Part B

Calculate the enthalpy of the reaction4B(s)+3O2(g)→2B2O3(s)

given the following pertinent information:B2O3(s)+3H2O(g)→3O2(g)+B2H6(g), ΔH∘A=+2035 kJ2B(s)+3H2(g)→B2H6(g), ΔH∘B=+36 kJH2(g)+12O2(g)→H2O(l), ΔH∘C=−285 kJH2O(l)→H2O(g), ΔH∘D=+44 kJ

Express your answer with the appropriate units.

Concepts and reasonAn equation which contains all the reactants and products with their physical states mentioned in brackets and enthalpy of reaction is termed as thermochemical equation.The enthalpy of a reaction is the change in energy during the reaction at given temperature and pressure.The enthalpy of given reaction is calculated using Hess’s law by taking help of the reaction enthalpies of other given reactions.

FundamentalsHess’s law states that the total enthalpy change for a reaction during the complete course of time is same irrespective of the path it follows.If a reaction is made up of more than one step, the overall enthalpy of the final reaction is the summation of individual enthalpies of each step.The thermochemical equation follows some simple set of rules to calculated the enthalpy of a reaction:

If a reaction is reversed, the enthalpy change sign is also reversed.
If a reaction is multiplied/divided by a constant, the enthalpy is also multiplied/divided with that same number.

Answer:Part A

The given reactions are as follows:

Equation number 2 is reversed and multiplied by 2 to get,The reaction for which enthalpy is to be determined is,Equation number 1 is multiplied by 2 to get,Adding equation number 3 and 5, we get

Part BThe given reactions are as follows:

The reaction for which enthalpy is to be determined is,From the equation, the required reaction contains 4 moles of B as a reactant, therefore, equation number 7 is multiplied by 2.Equation number 6 is multiplied by 2 and reversed to get,Equation number 8 is multiplied by 6 and reversed to get,Equation number 9 is multiplied by 6 and reversed to get,

Given the following reactions: N2(g)+2O2(g)-->2NO2(g) ΔH

Given the following reactions: N2(g)+2O2(g)–>2NO2(g) ΔH – 2NO2(g) –> 2 NO(g) + O2(g) ΔH=114.2 kJ (Notice the sign change when you reverse the reaction) Now, algebraically sum the two reactions and the ΔH values. You get: N2(g) + O2(g) –> 2 NO(g) ΔH = 180.6 kJ. The substances that are identical on each side of the arrow are canceled out and the remainder should be the reaction of interest.Calculate the standard molar enthalpy of formation of NO(g) from the following data: N2(g)+2O2 2NO2(g) ΔH298° =66.4kJ 2NO(g)+O2 2NO2(g) ΔH298° =−114.1kJ -1615.0 kJ calculate the standard enthalpy change for each of the following reaction: Si(s)+2F2(g) SiF4(g) ΔHf °: -1615.0Problem: Given the following reactions N2 (g) + 2O2 (g) → 2NO2 (g) ΔH = 66.4 kJ 2NO (g) + O2 (g) → 2NO2 (g) ΔH = -114.2 kJ the enthalpy of the reaction of the nitrogen to produce nitric oxide is _____ kJ. a) -47.8 b) 47.8 c) 180.6 d) -180.6 e) 90.3

Chem Ch 5 (Exam 3) Flashcards | Quizlet – Show transcribed image text Calculate the enthalpy of the reaction 2NO(g) + O2(g) rightarrow 2NO2(g) given the following reactions and enthalpies of formation: 1/2N2(g) + O2(g) rightarrow NO2(g), Delta H degree = 33.2 kj 1/2N2(g) + 1/2O2(g) rightarrow NO(g), Delta H degree = 90.2 kJ Express your answer with the appropriate units. Calculate the enthalpy of the reaction 4B(s) + 3O2(g) rightarrowCalculate the standard entropy change for the dimerization of NO2: 2NO2(g)→N2O4(g)at 298 K, if S ∆H f J/K·mol NO2(g) 240.06 33.18 N2O4(g) 304.29 9.16 Answer in units of J/K·mol Chemistry You wish to know the enthalpy change for the formation of liquid PCl3 from the elements shown below.We're being asked to determine the enthalpy change (ΔH rxn) for the chemical reaction: 2 NO(g) + O 2 (g) → 2 NO 2 (g) We can use Hess's Law to determine the enthalpy change of the overall reaction from the given reactions: 1. 1/2 N 2 (g) + O 2 (g) → NO 2 (g), ΔH° 1 = 33.2 kJ

Chem Ch 5 (Exam 3) Flashcards | Quizlet

Answer: Given the following reactions N2 | Clutch Prep – Answer to 1-Calculate the enthalpy of the reaction 2NO(g)+O2(g)?2NO2(g) given the following reactions and enthalpies of formation:…Answer to Part A Calculate the enthalpy of the reaction 2NO(g)+O2(g)?2NO2(g) given the following reactions and enthalpies of forma…See the answer Calculate the enthalpy of the reaction 2NO (g)+O2 (g)→2NO2 (g) given the following reactions and enthalpies of formation: 12N2 (g)+O2 (g)→NO2 (g), ΔH∘A=33.2 kJ 12N2 (g)+12O2 (g)→NO (g), ΔH∘B=90.2 kJ

Additional Hess Law With Answers (1).doc - Answers To
Chemistry Archive | February 24, 2018 | Chegg.com
Calculate the Enthalpy of The Reaction 2NO(g) + O2(g)2NO2
Chemical Equilibrium For Iit Jee
Edexcel Jan 2012 Paper 2 Q22 (with Explained Solutions)
(PDF) CHAPTER 1 CHEMISTRY: THE STUDY OF CHANGE Problem
Chemistry Archive | March 22, 2017 | Chegg.com
Solved: 1. For Each Of The Following Reactions, Calculate
Solved: Keq And ICE Problems Worksheet Calculate The Equil