# Problem: Given the following informationA + B → 2D   ΔH° = 724.9 kJ     ΔS° = 307.0 J/KC → D          ΔH° = 402.0 kJ      ΔS° = -139.0 J/KCalculate ΔG° for the following reaction at 298 K.A + B → 2C

86% (81 ratings)
###### FREE Expert Solution

• Use Hess's Law to find the the ΔH° and  ΔS° of the third reaction from the first two reactions
Manipulate the two reactions such that when you add them they will produce the third reaction
Changes made to the reaction should also be applied to ΔH° and  ΔS°

86% (81 ratings) ###### Problem Details

Given the following information

A + B → 2D   ΔH° = 724.9 kJ     ΔS° = 307.0 J/K

C → D          ΔH° = 402.0 kJ      ΔS° = -139.0 J/K

Calculate ΔG° for the following reaction at 298 K.

A + B → 2C

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Gibbs Free Energy concept. You can view video lessons to learn Gibbs Free Energy. Or if you need more Gibbs Free Energy practice, you can also practice Gibbs Free Energy practice problems.

What is the difficulty of this problem?

Our tutors rated the difficulty ofGiven the following informationA + B → 2D   ΔH° = 724.9 kJ  ...as medium difficulty.

How long does this problem take to solve?

Our expert Chemistry tutor, Dasha took 6 minutes and 54 seconds to solve this problem. You can follow their steps in the video explanation above.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Geissler's class at CAL.