Constants I Periodic Table The standard enthalpy of formation (AH;) is the enthalpy change that occurs when exactly 1 mol of a compound is formed from its constituent elements under standard conditions. The standard conditions Part A are 1 atm pressure, a temperature of 25 °C, and all the species present at a concentration of 1 M. A "standard enthalpies of formation table" containing AH values might look something like What is the balanced chemical equation for the reaction used to calculate AH; of MgCO3 (s)? If fractional coefficients are required, enter them as a fraction (i.e. 1/3). Indicate the physical states using the abbreviation ( s), (1), or (g) for solid, liquid, or gas, respectively. Use (aq) for aqueous solution. this: Substance ΔΗ Express your answer as a chemical equation. H(g) 218 kJ/mol H2 (g) o kJ/mol ΑΣφ ? o kJ/mol Mg?+ (aq) -462.0 kJ/mol Mg(s) C(g) 71 kJ/mol OA chemical reaction does not occur for this question. C(s) o kJ/mol N(g) 473 kJ/mol Submit Request Answer 02(g) o kJ/mol O(g) S2(g) 249 kJ/mol < Return to Assignment Provide Feedback 129 kJ/mol

Constants I Periodic Table The standard enthalpy of formation (AH;) is the enthalpy change that occurs when exactly 1 mol of a compound is formed from its constituent elements under standard conditions. The standard conditions Part A are 1 atm pressure, a temperature of 25 °C, and all the species present at a concentration of 1 M. A "standard enthalpies of formation table" containing AH values might look something like What is the balanced chemical equation for the reaction used to calculate AH; of MgCO3 (s)? If fractional coefficients are required, enter them as a fraction (i.e. 1/3). Indicate the physical states using the abbreviation ( s), (1), or (g) for solid, liquid, or gas, respectively. Use (aq) for aqueous solution. this: Substance ΔΗ Express your answer as a chemical equation. H(g) 218 kJ/mol H2 (g) o kJ/mol ΑΣφ ? o kJ/mol Mg?+ (aq) -462.0 kJ/mol Mg(s) C(g) 71 kJ/mol OA chemical reaction does not occur for this question. C(s) o kJ/mol N(g) 473 kJ/mol Submit Request Answer 02(g) o kJ/mol O(g) S2(g) 249 kJ/mol < Return to Assignment Provide Feedback 129 kJ/mol

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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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

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Constants I Periodic Table
The standard enthalpy of formation (AH;) is the
enthalpy change that occurs when exactly 1 mol of
a compound is formed from its constituent elements
Part A
under standard conditions. The standard conditions
are 1 atm pressure, a temperature of 25 °C, and
all the species present at a concentration of 1 M.
A "standard enthalpies of formation table"
containing AH values might look something like
What is the balanced chemical equation for the reaction used to calculate AH of MgCO3(s)?
If fractional coefficients are required, enter them as a fraction (i.e. 1/3). Indicate the physical states using the abbreviation (
s), (1), or (g) for solid, liquid, or gas, respectively. Use (aq) for aqueous solution.
this:
Substance
ΔΗ
Express your answer as a chemical equation.
H(g)
H2 (g)
Mg(s)
218 kJ/mol
o kJ/mol
ΑΣφ
o kJ/mol
Mg3+ (aq) -462.0 kJ/mol
C(g)
71 kJ/mol
NA chemical reaction does not occur for this question.
C(s)
o kJ/mol
N(g)
473 kJ/mol
Submit
Request Answer
02(g)
o kJ/mol
O(g)
249 kJ/mol
< Return to Assignment
Provide Feedback
S2(g)
129 kJ/mol

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