Gaseous iodine pentafluoride, IF5, can be prepared by thereaction of solid iodine and gaseous fluorine:I21s2 + 5 F21g2¡2 IF51g2A 5.00-L flask containing 10.0 g of I2 is charged with10.0 g of F2, and the reaction proceeds until one ofthe reagents is completely consumed. After the reactionis complete, the temperature in the flask is 125 °C.(a) What is the partial pressure of IF5 in the flask? (b) Whatis the mole fraction of IF5 in the flask (c) Draw the Lewisstructure of IF5. (d) What is the total mass of reactants andproducts in the flask?
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.
Gaseous iodine pentafluoride, IF5, can be prepared by the
reaction of solid iodine and gaseous fluorine:
I21s2 + 5 F21g2¡2 IF51g2
A 5.00-L flask containing 10.0 g of I2 is charged with
10.0 g of F2, and the reaction proceeds until one of
the reagents is completely consumed. After the reaction
is complete, the temperature in the flask is 125 °C.(a) What is the partial pressure of IF5 in the flask? (b) What
is the mole fraction of IF5 in the flask (c) Draw the Lewis
structure of IF5. (d) What is the total mass of reactants and
products in the flask?
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