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Ozone, O31g2, is a form of elemental oxygen that plays an
Chapter , Problem 5.41(choose chapter or problem)
Ozone, O31g2, is a form of elemental oxygen that plays an important role in the absorption of ultraviolet radiation in the stratosphere. It decomposes to O21g2 at room temperature and pressure according to the following reaction: 2 O31g2 3 O21g2 H = -284.6 kJ (a) What is the enthalpy change for this reaction per mole of O31g2? (b) Which has the higher enthalpy under these conditions, 2 O31g2 or 3O21g2?
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QUESTION:
Ozone, O31g2, is a form of elemental oxygen that plays an important role in the absorption of ultraviolet radiation in the stratosphere. It decomposes to O21g2 at room temperature and pressure according to the following reaction: 2 O31g2 3 O21g2 H = -284.6 kJ (a) What is the enthalpy change for this reaction per mole of O31g2? (b) Which has the higher enthalpy under these conditions, 2 O31g2 or 3O21g2?
ANSWER:Problem 5.41 Ozone, O (g)3is a form of elemental oxygen that plays an important role in the absorption ofultraviolet radiation in the stratosphere. It decomposes to O (g) at room temperature and 2pressure according to the following reaction: 2O 3) 3O (g) 2 H = -284.6 kJ(a) What is the enthalpy change for this reaction per mole of O (g) 3(b) Which has the higher enthalpy under these conditions, 2O (g) or 3O (g) 3 2 Step-by-step solution Step 1 of 2 (a)The decomposition reaction of ozone is shown below: 2O 3) 3O (g) 2The heat released, or enthalpy change during this reaction is, H = -284.6 kJThis indicates that enthalpy change for the conversion of two moles of O to three moles of O . 3 2We need enthalpy change to this reaction per mole of ozone. So, enthalpy change for thisreaction per mole of O (g) i3given by, 284.6 kJ Enthalpy change, H = 2 mol = -142.3 kJ/molTherefore, enthalpy change is .