[References] Copper metal can be prepared by roasting copper ore, which can contain cuprite (Cu₂S) and copper(II) sulfide. Cu₂ S(s) + O2(g) → 2 Cu(s) + SO2(g) CuS(s) + O₂(g) → Cu(s) + SO2(g) Suppose an ore sample contains 12.0% impurity in addition to a mixture of CuS and Cu₂S. Heating 100.0 g of the mixture produces 75.7 g of copper metal with a purity of 88.2%. What is the weight percent of CuS in the ore? The weight percent of Cu₂S? Weight percent of CuS= Weight percent of Cu₂S = Submit Answer % Try Another Version 9 item attempts remaining
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.
![[References]
Copper metal can be prepared by roasting copper ore, which can contain cuprite (Cu₂ S) and copper(II) sulfide.
Cu₂ S (s) + O2(g) → 2 Cu(s) + SO2(g)
CuS(s) + O₂(g) → Cu(s) + SO2(g)
Suppose an ore sample contains 12.0% impurity in addition to a mixture of CuS and Cu₂ S. Heating 100.0 g of the mixture produces 75.7 g of copper metal with a
purity of 88.2%. What is the weight percent of CuS in the ore? The weight percent of Cu₂S?
Weight percent of CuS =
2
Weight percent of Cu₂S:
Submit Answer
=
%
%
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