9. List the 6 state changes and indicate if they are endo- or exothermic.

Q: Which of the following processes will increase the potential energy of the system? (You may select…

A: Potential energy of the system is the energy which can be converted to kinetic energy of a system by…

Q: 4. Consider the following equations: 4 PCI; 1. P₁ + 6 Cl₂ → P₁ +50₂ → 2. P₂010 AH₁ = -1226 kJ AH₂ =…

A: Given, Enthalpy change for the few reactions are given, 1) P4 + 6Cl2  ➝ 4PCl3 ∆H1 = -1226 kJ 2) P4 +…

Q: 17. Acetic acid, CH,CO,H, is made industrially by the reaction of methanol and carbon monoxide. AH =…

A: The reaction taking place is given as, Given: Volume of acetic acid produced = 1.00 L = 1000 mL…

Q: (Q77) The standard Gibbs free energy (AG°rxn) for the formation of sulfur trioxide from sulfur…

A:

Q: You were tasked to find the enthalpy change in the reaction of an unknown salt with water using a…

A: a.) To calculate value of change in enthalpy , we use formula : ∆H = - q  where, q = value of heat ,…

Q: Why do some molecules have more chemical/potential energy than other molecules—what specifically…

A: The chemical or potential energy of a molecule is determined by the arrangement of its constituent…

Q: 4. In an experiment, 1.010 g of sugar (molar mass = 3423 gmol) gave off 16.7 kJ of hest in a…

A: Heat of combustion : It is defined as the amount of energy released when one mole of a substance is…

Q: The standard enthalpy of reaction, AH rxn, for the reaction, CaO(s) + SO3(g) → CaSO4(s) is -401.5 kJ…

A: Mole can be defined as a standard unit for measuring large quantities of very small entities such as…

Q: 2 H,S (g) +3 0, (g) → 2 H,0 (1) + 2 SO, (g) Exothermic or endothermic

A: Hydrogen sulfide reacts with oxygen to form water and sulfur dioxide. The equation for the balanced…

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.