Manganese oxide can be reduced to elemental manganese in the presence of methane (CH4). The products of the reaction are manganese metal, CO2, and water vapor. Practice only reporting the correct significant figures in all answers! a. Write a balanced reaction for the reduction of manganese (IV) oxide with methane to elemental manganese. b. Write a balanced reaction for the reduction of manganese (II) oxide with methane to elemental manganese. c. What is the mass percent of manganese in manganese (IV) oxide?
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.
Manganese oxide can be reduced to elemental manganese in the presence of methane (CH4). The products of the reaction are manganese metal, CO2, and water vapor. Practice only reporting the correct significant figures in all answers!
a. Write a balanced reaction for the reduction of manganese (IV) oxide with methane to elemental manganese.
b. Write a balanced reaction for the reduction of manganese (II) oxide with methane to elemental manganese.
c. What is the mass percent of manganese in manganese (IV) oxide?
d. What is the mass percent of manganese in manganese (II) oxide?
e. A mixture of manganese (IV) oxide and manganese (II) oxide is reduced in the presence of methane. After ten different trials utilizing different masses of unknown mixture, the data was plotted (mass of mixture versus mass of manganese produced) a slope of 0.6854 was obtained. What is the mass percentage of manganese (IV) oxide and manganese (II)
oxide in the mixture?
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