The experimental determination of ΔH° f and the change in enthalpy has to be calculated. Concept Introduction: The change in enthalpy that is associated with the formation of one mole of a substance from its related elements being in standard state is called standard enthalpy of formation ( ΔH f ° ). The standard enthalpy of formation is used to determine the standard enthalpies of compound and element. The standard enthalpy of reaction is the enthalpy of reaction that takes place under standard conditions. The equation for determining the standard enthalpies of compound and element can be given by, ΔH° reaction = ∑ nΔH° f (products) - ∑ mΔH° f (reactants)
The experimental determination of ΔH° f and the change in enthalpy has to be calculated. Concept Introduction: The change in enthalpy that is associated with the formation of one mole of a substance from its related elements being in standard state is called standard enthalpy of formation ( ΔH f ° ). The standard enthalpy of formation is used to determine the standard enthalpies of compound and element. The standard enthalpy of reaction is the enthalpy of reaction that takes place under standard conditions. The equation for determining the standard enthalpies of compound and element can be given by, ΔH° reaction = ∑ nΔH° f (products) - ∑ mΔH° f (reactants)
Solution Summary: The author explains that the change in enthalpy that is associated with the formation of one mole of a substance from its related elements being in standard state is known as standard.
The experimental determination of ΔH°f and the change in enthalpy has to be calculated.
Concept Introduction:
The change in enthalpy that is associated with the formation of one mole of a substance from its related elements being in standard state is called standard enthalpy of formation (ΔHf°). The standard enthalpy of formation is used to determine the standard enthalpies of compound and element.
The standard enthalpy of reaction is the enthalpy of reaction that takes place under standard conditions.
The equation for determining the standard enthalpies of compound and element can be given by,
ΔH°reaction=∑nΔH°f(products)-∑mΔH°f(reactants)
(b)
Interpretation Introduction
Interpretation:
The experimental determination of ΔH°f and the change in enthalpy has to be calculated.
Concept Introduction:
The change in enthalpy that is associated with the formation of one mole of a substance from its related elements being in standard state is called standard enthalpy of formation (ΔHf°). The standard enthalpy of formation is used to determine the standard enthalpies of compound and element.
The standard enthalpy of reaction is the enthalpy of reaction that takes place under standard conditions.
The equation for determining the standard enthalpies of compound and element can be given by,
Benzoic acid is used to determine the heat capacity of bomb calorimeters because it can be obtained in pure form and its energy of combustion is known very accurately (−26.43 kJ/g). Determine the heat capacity of a calorimeter that had a temperature increase of 9.199°C when 3.500 g of benzoic acid was used.
Given the standard enthalpies of formation for the following substances, determine the
reaction enthalpy for the following reaction.
2N2H4(g) + 2NO2(g) → 3N2(g) + 4H2O(g)
AHrxn
? kJ
Substance
AH in kJ/mol
N2H4(g)
+95.4
NO2(g)
+33.1
H2O(g)
-241.8
If 7.3 kJ of energy are required to change the temperature of water from 5.0 to 70.0, what was the volume of water? (cs = 4.184 J/(g ⋅ ), d = 1.00 g/mL)
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The Laws of Thermodynamics, Entropy, and Gibbs Free Energy; Author: Professor Dave Explains;https://www.youtube.com/watch?v=8N1BxHgsoOw;License: Standard YouTube License, CC-BY