elow are the equations of interest in this laboratory exercise. As you know from reading the laboratory handout, your goal is to determine the enthalpy change for reaction 1. (1) Mg(s) + 1/2O2(g) → MgO(s) ∆H1 = ∆Hf(MgO) = ? (2) Mg(s) + 2H+(aq) → Mg2+(aq) + H2(g) ∆H2 (measured) (3) MgO(s) + 2H+(aq) → Mg2+(aq) + H2O(I) ∆H3 (measured) (4) 1/2O2(g) + H2(g) → H2O(l) ∆H4 = -286.0 kJ/mol To arrive at equation (1) from the others equation (3) needs to be (pick one) Select one: a. kept the same b. multiplied by 2 c. reversed d. reversed and multiplied by 2
elow are the equations of interest in this laboratory exercise. As you know from reading the laboratory handout, your goal is to determine the enthalpy change for reaction 1. (1) Mg(s) + 1/2O2(g) → MgO(s) ∆H1 = ∆Hf(MgO) = ? (2) Mg(s) + 2H+(aq) → Mg2+(aq) + H2(g) ∆H2 (measured) (3) MgO(s) + 2H+(aq) → Mg2+(aq) + H2O(I) ∆H3 (measured) (4) 1/2O2(g) + H2(g) → H2O(l) ∆H4 = -286.0 kJ/mol To arrive at equation (1) from the others equation (3) needs to be (pick one) Select one: a. kept the same b. multiplied by 2 c. reversed d. reversed and multiplied by 2
Chemistry & Chemical Reactivity
10th Edition
ISBN:9781337399074
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
Section: Chapter Questions
Problem 81GQ: The standard molar enthalpy of formation of diborane, B2H6(g), cannot be determined directly because...
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Below are the equations of interest in this laboratory exercise. As you know from reading the laboratory handout, your goal is to determine the enthalpy change for reaction 1.
(1) Mg(s) + 1/2O2(g) → MgO(s) ∆H1 = ∆Hf(MgO) = ?
(2) Mg(s) + 2H+(aq) → Mg2+(aq) + H2(g) ∆H2 (measured)
(3) MgO(s) + 2H+(aq) → Mg2+(aq) + H2O(I) ∆H3 (measured)
(4) 1/2O2(g) + H2(g) → H2O(l) ∆H4 = -286.0 kJ/mol
To arrive at equation (1) from the others equation (3) needs to be (pick one)
Select one:
a. kept the same
b. multiplied by 2
c. reversed
d. reversed and multiplied by 2
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