For boiling of propyl alcohol (CH3 CH2 CH2 OH), the reaction CH3 CH2 CH2 OH ---> CH3 CH2 CH2 OH(g) it is found that Hrxn = 47.5 kJ/mol and Srxn = 129.0 J/molK. a) Based on the above data, estimate the value for Tb, the normal boiling point for propyl alcohol. b) The experimental value for the normal boiling point for propyl alcohol is Tb = 97. C. Is this the same (to within +-1. C) as the value found in part a? If not, explain why the value in part a is different than the experimental value?
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.
For boiling of propyl alcohol (CH3 CH2 CH2 OH), the reaction
CH3 CH2 CH2 OH ---> CH3 CH2 CH2 OH(g)
it is found that Hrxn = 47.5 kJ/mol and Srxn = 129.0 J/molK.
a) Based on the above data, estimate the value for Tb, the normal boiling point for propyl alcohol.
b) The experimental value for the normal boiling point for propyl alcohol is Tb = 97. C. Is this the same (to within +-1. C) as the value found in part a? If not, explain why the value in part a is different than the experimental value?
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
