Q9a)The following thermochemical equation is for the reaction of hydrogen bromide(g) to form hydrogen(g) and bromine(l).2HBr(g)H2(g) + Br2(l) H =72.6 kJ/mol-rxnHow many grams of HBr(g) would be made to react if 13.9 kJ of energy were provided?gramsb)The following thermochemical equation is for the reaction of iron(s) with hydrochloric acid(aq) to form iron(II) chloride(s) andhydrogen(g).Fe(s) + 2HCl(aq)FeCl2(s) + H2(g) H =-7.40 kJ/mol-rxnWhen 13.2 grams of iron(s) react with excess hydrochloric acid(aq), kJ of energy are absorbed or evolved?c)The following thermochemical equation is for the reaction of tetraphosphorus decaoxide(s) with water(l) to form phosphoric acid(aq).P4O10(s) + 6H2O(l)4H3PO4(aq) H = -453 kJ/mol-rxnHow many grams of P4O10(s) would have to react to produce 125 kJ of energy?grams

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Answered: Q9 a)The following thermochemical…

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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a)The following thermochemical equation is for the reaction of hydrogen bromide(g) to form hydrogen(g) and bromine(l).

2HBr(g)H₂(g) + Br₂(l)

H =

72.6

kJ/mol-rxn

How many grams of HBr(g) would be made to react if 13.9 kJ of energy were provided?

grams

b)The following thermochemical equation is for the reaction of iron(s) with hydrochloric acid(aq) to form iron(II) chloride(s) andhydrogen(g).

Fe(s) + 2HCl(aq)FeCl₂(s) + H₂(g)

H =

-7.40

kJ/mol-rxn

When 13.2 grams of iron(s) react with excess hydrochloric acid(aq), kJ of energy are absorbed or evolved?

c)The following thermochemical equation is for the reaction of tetraphosphorus decaoxide(s) with water(l) to form phosphoric acid(aq).
P₄O₁₀(s) + 6H₂O(l)4H₃PO₄(aq)

H =

-453

kJ/mol-rxn

How many grams of P₄O₁₀(s) would have to react to produce 125 kJ of energy?

grams

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