AP Chemistrymediummcq1 pt
How much energy is needed to vaporize 36.0 g of water at 100 °C? (ΔHᵥap = 40.7 kJ/mol; H₂O = 18.0 g/mol)
A.81.4 kJ
B.40.7 kJ
C.20.4 kJ
D.163 kJ
Explanation
Core Concept
Moles = 36.0 ÷ 18.0 = 2.00 mol; q = 2.00 × 40.7 = 81.4 kJ.
Correct Answer
A81.4 kJ
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