The white powder of LiHCO3 is unstable and when heated the following reaction occurs: 2LiHCO3(s) → Li2CO3(s) + H2O(g) + CO2(g) A student performed a controlled experiment in which he heated 2.3 grams of LiHCO3 powder and collected the gases into a 1.4-liter container. At the end of the reaction the temperature in the tank was 350 ° C 1.a. Calculate how many grams of Li2CO3 were obtained at the end of the reaction. 1. b. Calculate the tank pressure at the end of the reaction. 1.c. Calculate the partial pressure of CO2 in the tank at the end of the reaction. 2. Answer the following questions for the reactants: CO2, H2O, Li2CO3, LiHCO3 a. Determine which of them has the weakest intermolecular forces. b. Determine which of the substances is a molecular substance with a constant dipole. c. Determine the systematic name for the ionic substances.
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 white powder of LiHCO3 is unstable and when heated the following reaction occurs:
2LiHCO3(s) → Li2CO3(s) + H2O(g) + CO2(g)
A student performed a controlled experiment in which he heated 2.3 grams of LiHCO3 powder and collected the gases into a 1.4-liter container. At the end of the reaction the temperature in the tank was 350 ° C
1.a. Calculate how many grams of Li2CO3 were obtained at the end of the reaction.
1. b. Calculate the tank pressure at the end of the reaction.
1.c. Calculate the partial pressure of CO2 in the tank at the end of the reaction.
2. Answer the following questions for the reactants: CO2, H2O, Li2CO3, LiHCO3
a. Determine which of them has the weakest intermolecular forces.
b. Determine which of the substances is a molecular substance with a constant dipole.
c. Determine the systematic name for the ionic substances.
Step by step
Solved in 2 steps with 1 images
