5. Why is it valid to add the enthalpies of any sequence of reactions to obtain the enthalpy of thereaction that is the sum of individual reactions?(a) Because H is a path dependent function(b) Because H is a state function(c) Because H is an extensive variable(d) Because the system is connected to the surroundings6. True or False: AH for breaking the first C-H bond in CH, is equal to the average C-H bondenthalpy in this molecule.(a) True(b) False7. Which of the following statement(s) is/are correct?(i)(ii)(iii)Breaking bonds are endothermic reactions4P carbon (diamond) = 0The standard reference state of a substance is the most stable state at I bar pressureand 298.15 KThere is no temperature dependence to reaction enthalpies(iv)(a) (i) and (ii)(b) (i). (ii) and (ii)(c) (i) and (iii)(d) All of the statements are correct8. Which of the following equations represents the formation of Fe;Os(s) from its elements intheir standard state?(a) Fe;Os(s) → 2Fe(s) + 30(g)(b) 2Fe(s) + 3/20:(g) → Fe:Os(s)(c) Fe(s) + O:(g)→ Fe;O3(s)(d) 1/2Fe(s) + 3/20:(g) → Fe:O3(s)9. True or False: The dependence of reaction enthalpy on temperature is determined by the heatcapacities of reactants and products.(a) True(b) False

Since you have asked multiple questions, we will solve the first question for you. If you want any…

S. Why is it valid to add the enthalpies of any sequence of reactions to obtain the enthalpy of the reaction that is the sum of individual reactions? (a) Because H is a path dependent function (b) Because H is a state function (c) Because H is an extensive variable (d) Because the system is connected to the surroundings

S. Why is it valid to add the enthalpies of any sequence of reactions to obtain the enthalpy of the reaction that is the sum of individual reactions? (a) Because H is a path dependent function (b) Because H is a state function (c) Because H is an extensive variable (d) Because the system is connected to the surroundings

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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5. Why is it valid to add the enthalpies of any sequence of reactions to obtain the enthalpy of the
reaction that is the sum of individual reactions?
(a) Because H is a path dependent function
(b) Because H is a state function
(c) Because H is an extensive variable
(d) Because the system is connected to the surroundings
6. True or False: AH for breaking the first C-H bond in CH, is equal to the average C-H bond
enthalpy in this molecule.
(a) True
(b) False
7. Which of the following statement(s) is/are correct?
(i)
(ii)
(iii)
Breaking bonds are endothermic reactions
4P carbon (diamond) = 0
The standard reference state of a substance is the most stable state at I bar pressure
and 298.15 K
There is no temperature dependence to reaction enthalpies
(iv)
(a) (i) and (ii)
(b) (i). (ii) and (ii)
(c) (i) and (iii)
(d) All of the statements are correct
8. Which of the following equations represents the formation of Fe;Os(s) from its elements in
their standard state?
(a) Fe;Os(s) → 2Fe(s) + 30(g)
(b) 2Fe(s) + 3/20:(g) → Fe:Os(s)
(c) Fe(s) + O:(g)→ Fe;O3(s)
(d) 1/2Fe(s) + 3/20:(g) → Fe:O3(s)
9. True or False: The dependence of reaction enthalpy on temperature is determined by the heat
capacities of reactants and products.
(a) True
(b) False

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