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In a generic chemical reaction involving reactants A and B and products C and D, aA + 6B>cC+ dD, the standard enthalpy A;H° of the reaction is given by A,H° = CA¢H° (C) +dA; H° (D) -aA; H°(A) – bA;H° (B) Notice that the stoichiometric coefficients, a, b, c d, are an important part of this equation. This formula is often generalized as follows, where the first sum on the right-hand side of the equation is a sum over the products and the second sum is over the reactants: A;H° =Lproducts nAç H° – Ereactants mAç H° where m and n represent the appropriate stoichiometric coefficients for each substance. Part A What is A,H° for the following chemical reaction? CO(g) + NH3(9)→HCN(g)+H2O(g) You can use the following table of standard heats of formation (Af H°) to calculate the enthalpy of the given reaction. Standard Heat of Standard Heat of Element/ Compound Formation Element/ Compound Formation (kJ mol-1) (kJ mol-') H(g) 218 N(g) 473 H2(9) O2 (g) NH3(g) 45.90 O(g) 249 CO(g) -110,5 H2O(g) -241.8 C(g) 71 HCN(g) 130.5 C(s) HNO3 (aq) -206.6 Express the standard enthalpy of reaction to three significant figures and include the appropriate units.

In a generic chemical reaction involving reactants A and B and products C and D, aA + 6B>cC+ dD, the standard enthalpy A;H° of the reaction is given by A,H° = CA¢H° (C) +dA; H° (D) -aA; H°(A) – bA;H° (B) Notice that the stoichiometric coefficients, a, b, c d, are an important part of this equation. This formula is often generalized as follows, where the first sum on the right-hand side of the equation is a sum over the products and the second sum is over the reactants: A;H° =Lproducts nAç H° – Ereactants mAç H° where m and n represent the appropriate stoichiometric coefficients for each substance. Part A What is A,H° for the following chemical reaction? CO(g) + NH3(9)→HCN(g)+H2O(g) You can use the following table of standard heats of formation (Af H°) to calculate the enthalpy of the given reaction. Standard Heat of Standard Heat of Element/ Compound Formation Element/ Compound Formation (kJ mol-1) (kJ mol-') H(g) 218 N(g) 473 H2(9) O2 (g) NH3(g) 45.90 O(g) 249 CO(g) -110,5 H2O(g) -241.8 C(g) 71 HCN(g) 130.5 C(s) HNO3 (aq) -206.6 Express the standard enthalpy of reaction to three significant figures and include the appropriate units.

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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In a generic chemical reaction involving reactants A and B and products C and D, aA + 6B>cC+ dD, the standard enthalpy A,H° of the reaction is given by A,H° = cA¢ H° (C) +dA¡ H° (D) -aAf H° (A) – bA;H° (B) Notice that the stoichiometric coefficients, a, b, c d, are an important part of this equation. This formula is often generalized as follows, where the first sum on the right-hand side of the equation is a sum over the products and the second sum is over the reactants: A:H° =Eprodncts nAf H° -Ereactants mAf H® where m andn represent the appropriate stoichiometric coefficients for each substance. Part A What is A,H° for the following chemical reaction? CO(g) + NH3 (9)→HCN(g) + H2O(g) You can use the following table of standard heats of formation (Af H°) to calculate the enthalpy of the given reaction. Standard Heat of Formation (kJ mol-1) Standard Heat of Element/ Compound Element/ Compound Formation (kJ mol-1) H(g) 218 N(g) 473 H2(g) O2 (g) NH3(g) -45.90 O(g) 249 CO(g) -110.5 H,0(g) -241.8 C(g) 71 HCN(g) 130.5 C(s) HNO3 (aq) -206.6 Express the standard enthalpy of reaction to three significant figures and include the appropriate units. • View Available Hint(s) HA ? Value Units
Transcribed Image Text:In a generic chemical reaction involving reactants A and B and products C and D, aA + 6B>cC+ dD, the standard enthalpy A,H° of the reaction is given by A,H° = cA¢ H° (C) +dA¡ H° (D) -aAf H° (A) – bA;H° (B) Notice that the stoichiometric coefficients, a, b, c d, are an important part of this equation. This formula is often generalized as follows, where the first sum on the right-hand side of the equation is a sum over the products and the second sum is over the reactants: A:H° =Eprodncts nAf H° -Ereactants mAf H® where m andn represent the appropriate stoichiometric coefficients for each substance. Part A What is A,H° for the following chemical reaction? CO(g) + NH3 (9)→HCN(g) + H2O(g) You can use the following table of standard heats of formation (Af H°) to calculate the enthalpy of the given reaction. Standard Heat of Formation (kJ mol-1) Standard Heat of Element/ Compound Element/ Compound Formation (kJ mol-1) H(g) 218 N(g) 473 H2(g) O2 (g) NH3(g) -45.90 O(g) 249 CO(g) -110.5 H,0(g) -241.8 C(g) 71 HCN(g) 130.5 C(s) HNO3 (aq) -206.6 Express the standard enthalpy of reaction to three significant figures and include the appropriate units. • View Available Hint(s) HA ? Value Units
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