A sample of Zn metal is allowed to react completely with an excess of HCI: ZnCl (aq) Zn e + 2HCI H2 (9) The H, gas produced was collected over water at 25.0 °C. The volume of Choose.. the gas is 4.35L, and the atmospheric pressure is 0.980 atm. Calculate the mass of Zn metal in (g) consumed in the reaction. ( given: vapor pressure of water at 25.0 °C = 23.8 mmHg ) A sample of 2.00 g of a vapor occupies 0.559 L at 97 °C and 0.967 atm. Calculate the molar mass of the Choose... compound The density of gas is found to be 1.084 g/L at 720 mmHg and 25 °C. the molar mass of this gas is Choose...

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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.