AP BIOLOGY

Detailed explanation-1: -Hence, we can conclude that the correct term used to describe the amount of heat required to prompt a phase change is latent heat of fusion.

Detailed explanation-2: -From the above observations, we concluded that ice melts at 0°C. During which heat is supplied but temperature does not rise shows that heat supplied is used to change the state of ice into water and when the ice is completely melted, the temperature starts to rise.

Detailed explanation-3: -Correct answer: (4) temperature falls, reaches 0ºC and remains constant only as long as both ice and water are present in it. Explanation: When the student places the thermometer in a beaker filled with crushed ice, its temperature will decrease until it reaches 0º and then it will become constant.

Detailed explanation-4: -Key Terms. latent heat of fusion: the energy required to transition one unit of a substance from solid to liquid; equivalently, the energy liberated when one unit of a substance transitions from liquid to solid.

Detailed explanation-5: -A block of ice is solid water. When heat (a form of energy) is added, the ice melts into liquid water. It has reached its melting point – 0°C. Continue to apply heat, and the water will turn into water vapour, which is water in its gaseous state.