There are two steps in the extraction of copper metal from chalcocite, a copper ore. In the first step, copper(I) sulfide and oxygen react to form copper(I) oxide and sulfur dioxide: →+2Cu2Ss 3O2g + 2Cu2Os 2SO2g In the second step, copper(I) oxide and carbon react to form copper and carbon monoxide: →+Cu2Os Cs + 2Cus COg Suppose the yield of the first step is 86.% and the yield of the second step is 64.% . Calculate the mass of copper(I) sulfide required to make 2.0kg of copper.
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.
There are two steps in the extraction of copper metal from chalcocite, a copper ore. In the first step, copper(I) sulfide and oxygen react to form copper(I) oxide and sulfur dioxide:
In the second step, copper(I) oxide and carbon react to form copper and carbon monoxide:
Suppose the yield of the first step is
and the yield of the second step is
. Calculate the mass of copper(I) sulfide required to make
of copper.
Be sure your answer has a unit symbol, if needed, and is rounded to the correct number of significant digits.
Step by step
Solved in 5 steps with 2 images
