Which process requires more energy per gram: melting ice or boiling water?
A) They both require the same amount of energy because both processes involve breaking intermolecular forces.
B) Melting ice takes more energy because more intermolecular forces are broken.
C) Boiling water takes more energy because more intermolecular forces are broken.
D) Melting ice takes more energy because it occurs at 0$\degree$C instead of 100$\degree$C.
E) The energy of these processes has never been compared.

Question

Quizplus · Accepted Answer

Boiling water requires more energy per gram than melting ice because boiling water involves breaking the stronger hydrogen bonds between water molecules, while melting ice involves breaking weaker intermolecular forces. Additionally, boiling water occurs at a higher temperature (100°C) than melting ice (0°C), which requires even more energy to achieve.

Which Process Requires More Energy Per Gram: Melting Ice or Boiling