4. A. Use the list of intermolecular and interparticle forces listed below to account for the following phenomena. Justify your answer in each case. London Dispersion Forces lonic Bonding Dipole-Dipole Interactions Metallic Bonding Hydrogen Bonding Covalent Bonding (i) NaCl has a very high heat of vaporization. (ii) The high volatility of helium (boiling point is – 267 °C, lowest of any element). (iii) What are the strongest attractive forces that must be overcome to boil carbon tetrachloride, (CCIL)? B. Read the following statement: NaF has a higher melting point than F2 because it has a greater molar mass. Do you agree with the statement? Explain why you believe the statement is true or fals-
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.
Step by step
Solved in 4 steps
