# Reactions and Themodynamics Related Question

• predentalgirl1
This means that the products are more stable and the reactions will proceed in the direction that forms these products.
predentalgirl1
1.) (a) Give the reaction, with molecular structures, of 2-propanol with KMnO4 and 1-pentanol with KMnO4 and calculate the differences in the average bond energies of the reactants and products (ignore KMnO4 and any other side reactions in the calculations).
the reaction, with molecular structures, of 2-propanol with KMnO4,is

5CH3CHOHCH3 + 2KMnO4 + 6H+ → 5CH3COCH3 + 2Mn2 + + 8H2 O

bond energy of reactants= C – C is 3 x 80 = 240
C – H is 7 x 98=686
C – O is 1 x 78=78
O – H is 1 x 110=110
The total bond energy of reactants = 240+686+78+110= 1114kcal/mole

bond energy of products= C – C is 3 x 80 = 240
C – H is 6 x 98=588
C= O is 1 x 187=187
The total bond energy of products = 240+588+187= 1015kcal/mole
the differences in the average bond energies of the reactants and products,
= 1114-1015= -99kcal/mole

(THIS WILL NOT POST RIGHT FOR SOME REASON...)

H H H H H H H H H
****|***|***|***|***|**************KMnO4********| | | |
*********H -C-C-C-C-C-OH***** ------->**** H-C-C-C-C-C=O
***************|****|****|***|**|******************************** **| | | | |****************
H H H HH H H H H H

bond energy of reactants= C – C is 4 x 80 = 320
C – H is 11 x 98=1078
C – O is 1 x 78=78
O – H is 1 x 110=110
The total bond energy of reactants = 320+1078+78+110= 1586kcal/mole

bond energy of products= C – C is 4 x 80 = 320
C – H is 10 x 98=980
C= O is 1 x 187=187
The total bond energy of products = 320+980+187= 1487kcal/mole
the differences in the average bond energies of the reactants and products,
= 1586-1487= -99kcal/mole

(b) From your calculations does it appear that formation of the ketone or the carboxylate salt is more thermodynamically favored? Why?

From the calculations it is seen that both the reactions are thermodynamically favaoured. Since, the bond energy of the products is less than that of reactants.

Is this correct guys?

Last edited:

Yes, your calculations and reasoning are correct. The formation of both the ketone and the carboxylate salt is thermodynamically favored, as the bond energies of the products are lower than those of the reactants.

Yes, your calculations and conclusion are correct. The formation of both the ketone and the carboxylate salt is thermodynamically favored, as the bond energy of the products is lower than that of the reactants. This indicates that the products are more stable than the reactants, making the reactions spontaneous and thermodynamically favorable.

## 1. What is a chemical reaction?

A chemical reaction is a process in which one or more substances are converted into different substances with different physical and chemical properties. This process involves the breaking and forming of chemical bonds.

## 2. What are the three main types of chemical reactions?

The three main types of chemical reactions are synthesis (or combination), decomposition, and combustion. Synthesis reactions combine two or more substances to form a new compound, decomposition reactions break down a compound into two or more simpler substances, and combustion reactions involve the reaction of a substance with oxygen to produce heat and light.

## 3. How do you know if a reaction is exothermic or endothermic?

An exothermic reaction releases heat and energy, while an endothermic reaction absorbs heat and energy. This can be determined by measuring the change in temperature during the reaction. If the temperature increases, it is exothermic, and if it decreases, it is endothermic.

## 4. What is the difference between an exergonic and endergonic reaction?

An exergonic reaction releases energy, while an endergonic reaction requires energy to proceed. Exergonic reactions are spontaneous, meaning they occur without input of energy, while endergonic reactions are non-spontaneous and require an input of energy to occur.

## 5. How does temperature affect the rate of a chemical reaction?

Increasing temperature generally increases the rate of a chemical reaction. This is because higher temperatures provide more energy for reactant molecules to collide and overcome the activation energy barrier. However, at very high temperatures, the reaction may slow down or even stop due to the denaturation of enzymes or the breakdown of reactant molecules.

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