Question

The graph below shows the phase change for H2O. Which statement best describes what is occurring at segment A? (1 point) Responses As energy increases, the temperature remains the same. As energy increases, the temperature remains the same. As energy increases, temperature also increases. As energy increases, temperature also increases. As temperature increases, energy remains the same. As temperature increases, energy remains the same. Energy and temperature remain the same.

There is flat straight line going x axis

Answer 1

In a phase change graph for water (H2O), segment A, which you describe as a flat straight line along the x-axis, represents the phase change from one state to another (such as from solid to liquid or from liquid to gas). During this segment, energy is being added to the system, but the temperature remains constant as the substance is changing phases.

Therefore, the best statement that describes what is occurring at segment A is:

**As energy increases, the temperature remains the same.**