Ina calorimetry experiment a student determines the enthalpy for the reaction of magnesiam with hydrochioric acid to be 430 kmol The true enthalpy for this reaction is 450 k/mol. Which of the following sources of error could account for this discrepancy? Note the equation used in your Lab to calcudate the heat (e) as you awer this question Alter recording th mas some of the magnesium was dropped on the counter The final temperature was recorded betore the reaction was complete The calorimeter was not tightly shut for the experiment Some of the hot hydrogen gas escaped during the reaction All of the stated eerors would cause a falsely high value for the enthalpy
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.
Trending now
This is a popular solution!
Step by step
Solved in 3 steps
