Physical Change vs. Chemical Change experiment:

In your Physical Change vs. Chemical Change experiment, what was the most common chemical matter by name?

• chlorox

• ammonia

• water

• ammonium ion

What 2 types of elements and how many of each element make up your main molecule in your Physical Change vs. Chemical Change experiment?

• 2 Hydrogen's and 1 Oxygen

• 1 Hydrogen and 2 Oxygen's

• 1 Nitrogen and 3 Hydrogen's

• 1 Hydrogen and 3 Nitrogen's

In your Physical Change vs. Chemical Change experiment:

Describe the main behavior or motion of the main type of molecules at the start of the experiment when the Temperature was set at 300 Kelvin?

• vibration

• sliding

• colliding and spreading

• breaking & making bonds

• recombining of building blocks (aka: "atoms")

In your Physical Change vs. Chemical Change experiment:

What is the molecular spacing orientation or lay-out of particles of the main molecule type when early on in the lab they are at 300 Kelvin?

• tightly packed in orderly rows

• tightly packed & not in orderly rows

• fairly packed and mainly sliding

• well spread out and disorderly

What state of matter is NH3 in at 294 Kelvin?

See Molecular Weight (g/mol) vs. Boiling Point (Kelvin) graph.

• solid

• liquid

• gas

• aqueous

In your Physical Change vs. Chemical Change experiment: Describe the main behavior of the NH₃ molecules at 100 K?

• vibration

• sliding

• colliding & spreading

• evenly blending

Many of our gas laws require you to plug in a temperature value that is in the unit: Kelvin.

How do I convert from degrees Celsius in temperature to Kelvin?

• add 273

• subtract 273

• add 100

• they are the same Temperature unit

• it is not possible to convert between Celsius and Kelvin temperature

What state of matter is NH3 at 100 K?

• solid

• liquid

• gas

• aqueous

In your Physical Change vs. Chemical Change experiment:

How does the "motion" of particles of NH3 differ between 300 Kelvin and 100 Kelvin for temperature.

• different speeds: the 300 K is moving on average faster

• different particle sample sizes: the 300 K particle orientation is more spread out

• different types of particle dance: the 300 K particle dance is colliding & spreading, while the 100 K is mainly sliding particles

• all the other answers are correct

In your Physical Change vs. Chemical Change experiment:

Did the individual NH3 molecules' chemical formula (aka: "chemical make-up or composition") change when you changed the temperature in the box from 300 K to 100 K? Give your reasoning.

• Yes, because when you go between those two temperatures, building blocks (atoms) are being recombined

• No, because all temperature and state changes are in fact: physical changes, and physical changes do not produce a new substance

• No, because there is never a new chemical being made during a chemical change