Purchase Solution

Calculating Delta S for reaction

Not what you're looking for?

Ask Custom Question

1. At two different temperatures, the reaction A & B is allowed to reach equilibrium and Delta H is measure. Delta H =10.9 kJ/mol for this reaction at 5.5 C and Delta H=31.0 kJ/mol at 80.1 C. Calculate Delta S for this reaction at each of these two temperatures. (Hint Delta G = 0 at equilibrium).

Purchase this Solution
Solution Summary

The solution calculates delta S for a reaction at two different temperatures. The delta G of the reaction at equilibrium is equal to zero.

Solution Preview

Remember the Gibbs equation that relates delta H, delta G and delta S?

I'll use dH and dG and dS as abbreviations.

dG = dH - TdS

Now, at equilibrium, delta G is always = 0.

Therefore,

0 = dH - TdS

Let's rearrange the equation by adding TdS to each ...

Purchase this Solution
Free BrainMass Quizzes
Thermochemistry

The quiz helps in revising basic concepts about thermochemistry.

Periodic table

Functional groups in Organic Chemistry

You will be tested on the names of functional groups in Organic Chemistry. It is very important to know the functional groups to understand Organic reactions.

Match Elements with their Symbols

Elements are provided: choose the matching one- or two-letter symbol for each element.

Organic Chemistry Naming: Alkanes

This is a quiz which is designed to assist students with learning the nomenclature used to identify organic compounds. This quiz focuses on the organic compounds called Alkanes.

View More Free Quizzes
Related BrainMass Solutions

  • Calculating delta S

    7140 Calculating delta S Calculate "delta" S for the following reaction: H2(g) + Br2(l) --> 2HBr(g) Given: S[H2(g)] = 0.131 kJ/K S[Br2(l)] = 0.152 kJ/K S[HBr(g)] = 0.199kJ/K a. 0.482 kJ/K b. 0.681 kJ/K c. 0.115 kJ/K d

  • Calculate delta S for the reaction

    60789 Calculate Delta S for the Reaction Calculate delta S for the reaction: 4 Cr(s) + 3 O2(g) yields 2 Cr2O3(s) Substance Cr(s) O2(g) Cr2O3(s) S (J/K mol) 23.77 205.138 81.2

  • Calculating Delta G

    S(s) + 3/2 O2(g)--------->SO3(g) delta G standard = -371kJ 2SO2(g)+ O2(g)--------->2SO3(g) delta G standard = -142kJ Now calculate delta G standard for the reaction.

  • Enathalpy of the reaction

    106599 Enathalpy of the Reaction 1.) Calculate delta H for the following reaction: The reduction of aluminum oxide by hydrogen gas: Al2O3(s) + 3H2(g) ------- 2Al(s) + 3H2O(g) 2.) Solve for entalapy using Hess's Law.

  • Organic Chemistry - Calculating Molar Solubility

    For a reaction to be spontaneous at any temperature, which one of the following is true: a) [delta] H is positive and [delta] S is positive b) [delta] H is positive and [delta] S is negative c) [delta] H is negative and [delta] S is negative

  • Calculating delta G and standard cell potential

    285263 Calculating delta G and standard cell potential Consider the oxidation of ammonia: 4NH3 (g) + 3O2(g) --> 2N2 (g) + 6H2O Calcualte the delta G for the reaction.

  • Calculating Temperature Change in Water After a Reaction

    9841 Calculating Temperature Change in Water After a Reaction 10.1 g CaO is dropped into a styrofoam coffee cup containing 157 g H2O at 18.0 degrees C.

  • Calculating Delta H

    534848 Calculating Delta H Use some or all of the following reaction enthalpies to calculate delta H for the reaction: 3NH3(aq) + ClO- (aq) --> N2H4(g) + NH4+ (aq) + Cl- (aq) + OH- (aq) Cl- (aq) + H2O2(l) --> H2O(l) + ClO- (aq) delta H =

  • Predicting Reactions and Calculating Quantity

    109224 Predicting Reactions and Calculating Quantity Predict whether the following reaction would proceed spontaneously as written at 298 K by calculating both Delta G and e for the reaction, given that [Co2+] =.15 M and [Fe2+]= 0.68 M. ( E1/2= -0.282

View More Related Solutions