04 Fill in the Blank Drag and Drop Use the reaction below to determine the mass of oxygen needed to completely react 450.4 grams of butane (C4H10). 2 C.H10 13 O2 --- --> 8 CO2 10 H20 Molar mass of butane = 1 mole Molar mass of oxygen = 16.00 mole 450.4 g of butane = 1 i moles -1 Moles of oxygen needed = 1 i moles Mass of oxygen needed = 1 i grams : 7.747 :: 50.36 : 1611 : 450.4 : 58.14 :: 1522 :32.00
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.
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