4. Powdered zinc reacts rapidly with powdered sulfur in a highly exothermicreaction.8 Zng) + S8()What mass of zinc sulfide is expected when 32.0 g of Sg reacts with sufficient zinc?5. The addition of concentrated hydrochloric acid to manganese (IV) oxide leads tothe production of chlorine gas.4 HCl(aq) + MnO2(3)MnCl2(aq) + Cl2(e) +2H2O0What mass of Cl can be obtained when 4.76 • 10 g of HCl react with sufficientMnO2?6. Aluminum carbide, Al4C3, is a yellow powder that reacts with water to producealuminum hydroxide and methane.Al,C3(6) + 12 H2Om4 Al(OH)3() +3 CH4(g)What mass of water is required to react completely with 25.0 g of aluminumcarbide?

Answered: 4. Powdered zinc reacts rapidly with…

4. Powdered zinc reacts rapidly with powdered sulfur in a highly exothermic reaction. 8 Zng) + S8() 8ZnS(6) What mass of zinc sulfide is expected when 32.0 g of Sg reacts with sufficient zinc?

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter3: Chemical Reactions

Section: Chapter Questions

Problem 108QRT

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Concept explainers

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.

Question

4. Powdered zinc reacts rapidly with powdered sulfur in a highly exothermic
reaction.
8 Zng) + S8()
What mass of zinc sulfide is expected when 32.0 g of Sg reacts with sufficient zinc?
5. The addition of concentrated hydrochloric acid to manganese (IV) oxide leads to
the production of chlorine gas.
4 HCl(aq) + MnO2(3)
MnCl2(aq) + Cl2(e) +2H2O0
What mass of Cl can be obtained when 4.76 • 10 g of HCl react with sufficient
MnO2?
6. Aluminum carbide, Al4C3, is a yellow powder that reacts with water to produce
aluminum hydroxide and methane.
Al,C3(6) + 12 H2Om
4 Al(OH)3() +3 CH4(g)
What mass of water is required to react completely with 25.0 g of aluminum
carbide?

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