   Chapter 15.6, Problem 1.1ACP

Chapter
Section
Textbook Problem

Anhydrous ammonia is used directly as a fertilizer, but much of it is also converted to other fertilizers such as ammonium nitrate and urea. a. Write a balanced equation for the conversion of ammonia to ammonium nitrate. b. Urea is formed in the reaction of ammonia and CO2. 2 NH3(g) + CO2(g) ⇄ (NH2)2CO(s) + H2O(g)Would high pressure favor urea production? Would high temperature? ΔfH° for solid urea = −333.1 kJ/mol-rxn). Explain your answers.

(a)

Interpretation Introduction

Interpretation: Balanced equation for the conversion of ammonia to ammonium nitrate has to be written.

Concept Introduction:

Balanced reaction is a chemical reaction in which number of atoms for each element in the reaction and the total charge are same on both reactant side and the product side.

Steps in balancing the information

• Step 1: Write the unbalanced equation
• Step 2: Find the coeffienct to balance the equation.
• The coeffienct should be reduced to the smallest whole number
Explanation

4NH3+7O24NO2+6H2O

4NO2+2H2O2HNO3+2HNO2

2HNO3

(b)

Interpretation Introduction

Interpretation: High pressure or high temperature favor for urea production has to be identified and explained.

Concept Introduction:

Enthalpy change for the reaction ΔrH0=ΣnΔfH0(products)-ΣnΔfH0(reactants)

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