Solid Sodium Peroxide (Na₂O₂)reacts with Liquid Water Yielding Aqueous Sodium $\Delta$

question 6

Multiple Choice

Solid sodium peroxide (Na₂O₂) reacts with liquid water yielding aqueous sodium hydroxide and oxygen gas. How much heat is released when 250.0 L of oxygen gas is produced from the reaction of sodium peroxide and water if the reaction is carried out in an open container at 1.000 atm pressure and 25°C? (Given: $\Delta$ H°_f[Na₂O₂(s) ] = -510.9 kJ/mol; $\Delta$ H°_f[NaOH(aq) ] = -469.2 kJ/mol; $\Delta$ H°_f[H₂O(l) ] = -285.8 kJ/mol)

• A)35,400 kJ
• B)1740 kJ
• C)141.7 kJ
• D)3330 kJ
• E)2900 kJ

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