Use the graph and diagram to answer the question.

Question

Which option describes the particles of water as the liquid water actively boils?

(1 point)
Responses

The particles will lose kinetic energy and decrease temperature during boiling.
The particles will lose kinetic energy and decrease temperature during boiling.

The particles will have the same average kinetic energy and the same temperature during boiling.
The particles will have the same average kinetic energy and the same temperature during boiling.

The particles will have the same average kinetic energy and a decrease in temperature during boiling.
The particles will have the same average kinetic energy and a decrease in temperature during boiling.

The particles will lose kinetic energy and increase temperature during boiling.

Answer 1

The correct response is:

The particles will have the same average kinetic energy and the same temperature during boiling.

During boiling, the temperature of the liquid remains constant; thus, the average kinetic energy of the particles does not change even though some particles are transitioning from the liquid phase to the gas phase.

Answer 2

Use the graph and diagram to answer the question.

Which is the best interpretation of the two flat portions of the graph?

(1 point)
Responses

These show where kinetic energy is increasing.
These show where kinetic energy is increasing.

These show where thermal energy does not exist.
These show where thermal energy does not exist.

These show where changes of state are occurring.
These show where changes of state are occurring.

These show where temperature is 0ºC.

Answer 3

The correct response is:

These show where changes of state are occurring.

In a heating/cooling curve graph, the flat portions represent the phase changes (such as melting or boiling), where the temperature remains constant as the substance transitions between states of matter, despite the continued input of heat.