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Part B The decomposition of NI3 to form N₂ and I2 releases -290.0 kJ of energy. The reaction can be represented as Find the change in enthalpy when 16.0 g of NI3 decomposes. Express your answer to three significant figures and include the appropriate units. ► View Available Hint(s) Value Submit μà Units Part C ? Calculation of the heat of reaction based on the standard heat of formation The enthalpy change for the formation of 1 mol of a substance in its standard state from its constituent elements in their standard states is called the standard heat of formation. It is denoted as Af Hᵒ. If the standard heat of formation of the reactants and the products is known, the standard heat of reaction can be calculated using the formula Here, np is the total number of moles of products, and n, is the total number of moles of reactants. Consider the exothermic reaction 2NI3 (8) N2(g) + 312(g), A,H=-290.0 kJ Express your answer to four significant figures and include the appropriate units. A,H° = Σn, Af H° (products) - Σn, Af H° (reactants). 2C₂H6(g) +702(g) →4CO₂(g) + 6H₂O(g) Calculate the standard heat of reaction, or A,H°, for this reaction using the given data. Also consider that the standard enthalpy of the formation of elements in their pure form is considered to be zero. Reactant or product C₂H6 (9) CO₂(g) H₂O(g) Af Hº (kJ mol-¹) -84.7 -393.5 -241.8

Part B The decomposition of NI3 to form N₂ and I2 releases -290.0 kJ of energy. The reaction can be represented as Find the change in enthalpy when 16.0 g of NI3 decomposes. Express your answer to three significant figures and include the appropriate units. ► View Available Hint(s) Value Submit μà Units Part C ? Calculation of the heat of reaction based on the standard heat of formation The enthalpy change for the formation of 1 mol of a substance in its standard state from its constituent elements in their standard states is called the standard heat of formation. It is denoted as Af Hᵒ. If the standard heat of formation of the reactants and the products is known, the standard heat of reaction can be calculated using the formula Here, np is the total number of moles of products, and n, is the total number of moles of reactants. Consider the exothermic reaction 2NI3 (8) N2(g) + 312(g), A,H=-290.0 kJ Express your answer to four significant figures and include the appropriate units. A,H° = Σn, Af H° (products) - Σn, Af H° (reactants). 2C₂H6(g) +702(g) →4CO₂(g) + 6H₂O(g) Calculate the standard heat of reaction, or A,H°, for this reaction using the given data. Also consider that the standard enthalpy of the formation of elements in their pure form is considered to be zero. Reactant or product C₂H6 (9) CO₂(g) H₂O(g) Af Hº (kJ mol-¹) -84.7 -393.5 -241.8

Chemistry
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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Part B The decomposition of NI3 to form N₂ and I2 releases -290.0 kJ of energy. The reaction can be represented as Find the change in enthalpy when 16.0 g of NI3 decomposes. Express your answer to three significant figures and include the appropriate units. ► View Available Hint(s) Value Submit μᾶ Units Part C ? Calculation of the heat of reaction based on the standard heat of formation The enthalpy change for the formation of 1 mol of a substance in its standard state from its constituent elements in their standard states is called the standard heat of formation. It is denoted as Af Hᵒ. If the standard heat of formation of the reactants and the products is known, the standard heat of reaction can be calculated using the formula Here, np is the total number of moles of products, and n is the total number of moles of reactants. Consider the exothermic reaction 2NI3(s)→N₂(g) + 312(g), A₁H = −290.0 kJ Express your answer to four significant figures and include the appropriate units. A,H° = np Af H° (products) - Σn, Af H° (reactants). 2C2H6(g) +70₂ (g) →4CO₂(g) + 6H₂O(g) Calculate the standard heat of reaction, or A,Hº, for this reaction using the given data. Also consider that the standard enthalpy of the formation of elements in their pure form is considered to be zero. Reactant or product C₂H6 (9) CO₂(g) H₂O(g) Af H° (kJ mol-¹) -84.7 -393.5 -241.8
Transcribed Image Text:Part B The decomposition of NI3 to form N₂ and I2 releases -290.0 kJ of energy. The reaction can be represented as Find the change in enthalpy when 16.0 g of NI3 decomposes. Express your answer to three significant figures and include the appropriate units. ► View Available Hint(s) Value Submit μᾶ Units Part C ? Calculation of the heat of reaction based on the standard heat of formation The enthalpy change for the formation of 1 mol of a substance in its standard state from its constituent elements in their standard states is called the standard heat of formation. It is denoted as Af Hᵒ. If the standard heat of formation of the reactants and the products is known, the standard heat of reaction can be calculated using the formula Here, np is the total number of moles of products, and n is the total number of moles of reactants. Consider the exothermic reaction 2NI3(s)→N₂(g) + 312(g), A₁H = −290.0 kJ Express your answer to four significant figures and include the appropriate units. A,H° = np Af H° (products) - Σn, Af H° (reactants). 2C2H6(g) +70₂ (g) →4CO₂(g) + 6H₂O(g) Calculate the standard heat of reaction, or A,Hº, for this reaction using the given data. Also consider that the standard enthalpy of the formation of elements in their pure form is considered to be zero. Reactant or product C₂H6 (9) CO₂(g) H₂O(g) Af H° (kJ mol-¹) -84.7 -393.5 -241.8
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