When 568 G of Lead Reacts with 3

question 113

Multiple Choice

When 56.8 g of lead reacts with 3.50 L of oxygen gas,measured at 1.00 atm and 25.0°C,60.1 kJ of heat is released at constant pressure.What is ΔH° for this reaction? (R = 0.0821 L • atm/(K • mol) )
2Pb(s) + O₂(g) → 2PbO(s)

• A)-4.39 × 10² kJ
• B)-8.7 × 10¹ kJ
• C)-6.01 × 10¹ kJ
• D)-2.19 × 10² kJ
• E)-4.2 × 10² kJ

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