Do Now: Draw particles in the highlighted boxes for the three phases of matter. Beneath the particle diagrams, determine whether each phase is associated with being hot, cold, or room temperature.

COLD HOTROOM TEMP.

NOTE: These temperatures do not apply to all matter! For example: Nitrogen is a gas at room temperature.

Your homework: define the vocabulary terms on the top of page 2 using your

review book and/or textbook.

& good luck on your PSATs!!!

HIGH LOW

Fill the following blanks with SOLID or LIQUID or GAS (it is ok if you don’t know it… but try to think about the example… what phases are the examples starting and ending with?)

● Melting: Going from a _________________ to a _________________○ Example: holding an ice cube in your mouth until it is “gone”

● Freezing: Going from a _________________ to a _________________○ Example: filling an ice cube tray and putting it in the freezer to make ice.

● Vaporizing (aka boiling): Going from a _________________ to a _________________○ Example: What comes out of the pot when you boil water?

● Condensing: Going from a _________________ to a _________________○ Example: the steam that fogs up your mirror during a shower.

● Sublimating: Going from a _________________ to a _________________○ Example: The “smoke” coming off a block of dry ice (note: it is not smoke!)

● Deposing: Going from a _________________ to a _________________ ○ Example: Air forming frost on a cold blade of grass

Fill the following blanks with SOLID or LIQUID or GAS (it is ok if you don’t know it… but try to think about the example… what phases are the examples starting and ending with?)

● Melting: Going from a _________________ to a _________________○ Example: holding an ice cube in your mouth until it is “gone”

● Freezing: Going from a _________________ to a _________________○ Example: filling an ice cube tray and putting it in the freezer to make ice.

● Vaporizing (aka boiling): Going from a _________________ to a _________________

○ Example: What comes out of the pot when you boil water?

● Condensing: Going from a _________________ to a _________________○ Example: the steam that fogs up your mirror during a shower.

● Sublimating: Going from a _________________ to a _________________○ Example: The “smoke” coming off a block of dry ice (note: it is not smoke!)

● Deposing: Going from a _________________ to a _________________ ○ Example: Air forming frost on a cold blade of grass

SOLID LIQUID

GAS

SOLIDLIQUID

LIQUID

LIQUIDGAS

GAS

GAS

SOLID

SOLID

Now, turn back to the first page and label the highlighted boxes.

Read the following:

and make an educated guess about the definition of these 2 words

Share out: What do you think?

Textbook definitions:

Endothermic: any process which requires or absorbs energy from its surroundings, usually in the form of heat.

Exothermic: any process or reaction which releases energy to its surroundings, usually in the form of heat.

Endothermic

A + HEAT → B + C

Exothermic

X + Y → Z + HEAT

In a written chemical equation:

Try these out…

Try these out…

ENDOTHERMIC

EXOTHERMIC ENDOTHERMIC

EXOTHERMIC

Now, turn back to the first page and label the large arrows at the very top and bottom of the chart.

Which direction is endothermic?

Which is exothermic? (hint… look at the

temperature associated with each phase)

EXOTHERMIC

Take 5 minutes to do the top of page 4(#’s 1-5)

About 30 seconds

About 10 C

About 3 minutesAbout 50

C

increasing

heated

Heating curve

Ok… now take a minute to do number 6

6. Based on your answer to number 5, what would you call the chart below?COOLING CURVE

Explain:The temperature of the substance is decreasing (cooling)

7. Label the slanted lines on the chart below as you see here.

Think back to your responses for the do now (the temperature part). Which line represents the solid phase? The gas phase? The liquid phase? Label the phases on the chart.

SOLID

LIQUID

GAS

Your homework: define the vocabulary terms on the top of page 2 using your

review book and/or textbook.

& good luck on your PSATs!!!