Heating Curves

Between which points is the temperature of the substance remaining constant?

• A-B only

• A-B, C-D, and E-F

• B-C only

• B-C and D-E

The melting point of the sample is

• -60 ºC

• 20 ºC

• 60 ºC

• 100 ºC

Which letter indicates where water is in both the solid and liquid phase at the same time?

• A

• B

• C

• D

• E

A measure of the average kinetic energy of the particles in an object is called

• Heat

• Temperature

• Kinetic energy

• Enthalpy

In which region(s) does temperature increase?

• Region C only

• Regions B and D

• Regions A, C, and E

• Regions A and B

How many states of matter are present during line segment BC?

• One

• Two

• Three

• Depends on the temperature

In a heating curve, diagonal lines indicate temperature is __________, while flat lines indicate temperature is __________.

• Constant, changing

• Changing, constant

At which letter is the substance changing its state of matter?

• A only

• A, C, and E

• D and E

• B and D

Describe the substance at letters D.

• Gas

• Liquid

• Melting

• Evaporating

At higher temperatures

• Particles in an object move slower

• Particles in an object move faster

• Particles move at the same speed as lower temperature