The following reaction was performed in the lab: 8.0 g of solid baking soda ( NaHCO3 ) was placed in a ceramic dish and heated until it decomposed, according to the following equation: 2NaHCO3(s)→CO2(g)+H2O(g)+Na2CO3(s) The following experimental data was collected for the previous experiment: Mass of ceramic dish (empty) 9.50 g Mass of ceramic dish + NaHCO3 (before heating) 17.50 g Mass of ceramic dish (after heating) 14.00 g What mass of solid Na2CO3 would you expect to make in this experiment? Based on the data in the table, what was the actual yield of Na2CO3 in the experiment? What was the percent yield of Na2CO3 in the experiment?
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.
The following reaction was performed in the lab: 8.0 g of solid baking soda ( NaHCO3 ) was placed in a ceramic dish and heated until it decomposed, according to the following equation:
2NaHCO3(s)→CO2(g)+H2O(g)+Na2CO3(s)
The following experimental data was collected for the previous experiment:
|
Mass of ceramic dish (empty) |
9.50 g |
|
Mass of ceramic dish + NaHCO3 (before heating) |
17.50 g |
|
Mass of ceramic dish (after heating) |
14.00 g |
- What mass of solid Na2CO3 would you expect to make in this experiment?
- Based on the data in the table, what was the actual yield of Na2CO3 in the experiment?
- What was the percent yield of Na2CO3 in the experiment?
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