Engineering Phase Change

What does PCM stand for?

• Portable Change Monitor

• Physical Change Matter

• Phase Change Material

• Phase Change Monitor

What project our you helping design?

• hand warmer

• electric incubator

• non-electric incubator

• portable cooking devices

What company are you working for?

• ACME Incubators

• Futura

• Anton Green

What was the freezing point of the hand warmers we used in class?

• 100 degrees C

• 60 degrees C

• 0 degrees C

Did you freeze or melt the hand warmers in class?

• freeze

• melt

What chemical was used in the hand warmers?

• Sodium Acetate

• Sodium Hydroxide

• Epsom Salt

When you activated the hand warmer was heat transferred in or out of the hand warmer?

• in

• out

When I melt the hand warmers am I transferring heat in or out of the hand warmer?

• in

• out

When a substance is heated/cooled and undergoes a phase change the temperature of the substance actually stays the same until the entire phase change is completed.

• true

• false

What do we call the line between point B and C on the graph?

• temperature range

• temperature plateau

• temperature crystallization

• Jimmy