Chemistry
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Science Bowl Question

📅 NSB Round Robin 2018🎓 HS🔄 Round 10#️⃣ Question 1❓ Toss-Up📝 Multiple Choice

Steven plots temperature versus time as he heats water while adding energy at a constant rate. Which of the following statements best explains why the heating curve reaches a plateau at 100 degrees Celsius?

W) Energy is required to decrease the entropy of the water
X) Energy is required to decrease the enthalpy of the water
Y) Energy is required to break the hydrogen-oxygen bonds in water
Z) Energy is required to break the hydrogen bonds between water molecules
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