the substance is a gas at point ______
the substance is a gas at point ______
Answer
Explanation:
Step1: Analyze phase - change graph
On a temperature - time graph for a substance, flat sections represent phase - changes.
Step2: Identify phases
AB is solid heating up, BC is melting (solid - liquid phase change), CD is liquid heating up, DE is boiling (liquid - gas phase change), EF is gas heating up.
Answer:
F