Reactant R reacts with reactant S in two steps to yield product Z.(1)R+S TAH° = -50 kJ(2) T+S→zAH° = -150 kJNet R+2S→ZAH° = -200 kJDBAEHess's law diagramAH° FThe net reaction is represented bySelect one:a. arrow C.b. arrow A.c. line F.d. arrow B.

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The net reaction is represented by

Chemistry & Chemical Reactivity

9th Edition

ISBN:9781133949640

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter5: Principles Of Chemical Reactivity: Energy And Chemical Reactions

Section5.5: Enthalpy Changes For Chemical Reactions

Problem 1RC: 1. For the reaction 2 Hg(l) + O2(g) → 2 HgO(s), ∆rH° = 181.6 kJ/mol-rxn. What is the enthalpy change...

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Concept explainers

States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.

Question

Reactant R reacts with reactant S in two steps to yield product Z.
(1)
R+S T
AH° = -50 kJ
(2) T+S→z
AH° = -150 kJ
Net R+2S→Z
AH° = -200 kJ
D
B
A
E
Hess's law diagram
AH° F
The net reaction is represented by
Select one:
a. arrow C.
b. arrow A.
c. line F.
d. arrow B.

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