Chemical vs Physical
Dylan decided to make soup using the following steps. 1) Chop up celery and carrots. 2) Open a can of chicken broth. 3) Fill a pot with the broth, noodles, and the vegetables. 4) Place the pot on the gas stove and turn on the burner. Which of these represents a chemical change?
Burning the gas or Step 4
How is the temperature of a gas related to the thermal energy of its particles?
A - As the temperature increases, the thermal energy of the particles increases.
B - As the temperature decreases, the thermal energy of the particles increases.
A
One of these two are a physical change, which one is it? 1. Catching on fire 2. Changing the state of matter from a solid to liquid
2
Do solid particles move closer together or further apart when changing to a liquid?
Further apart - increase movement
Charlie and his family went on a camping trip. While on his trip, Charlie's family found an old, fallen tree near their campsite and chopped the log up for firewood. They used the wood to light a campfire where they roasted marshmallows. Give me one P and one C change that occurred.
Chopping the wood was a physical change as evidenced by the change in size and shape, while burning the wood is a chemical change as evidenced in energy, color, and form.
When a substance such as ice melts, its thermal energy increases.
Describe what happens to the arrangement of the water molecules as the thermal energy increases.
spread out, become less orderly
Solubility is the ability of a substance (solute) to dissolve in another substance (solvent). P or C?
P
If you freeze a Gatorade, will the particles move closer together or father apart?
Closer together
Which is evidence that a chemical reaction has occurred?
A - A phase change occurs
B - Red and yellow paint mixing to make orange paint
C - A new gas is observed in the form of bubbles
D - The temperature of the substance remains constant
C
How do you change liquid particles to gas?
Increase thermal energy
Is adding food coloring to a beaker of water a physical of chemical change?
Physical, Food colorants enhance our culinary creations without altering the fundamental chemistry of the ingredients involved.
When changing from a liquid to a gas, how do particles behave?
Spread out, move more freely
Are the following properties of copper Physical or Chemical?
Strong electrical conductivity, nonmagnetic, Melting point: 1,085 degrees Celsius
Physical
Arrange the following states of matter from least to greatest amount of energy. Plasma, Solid, Liquid, Gas
Solid, Liquid, Gas, Plasma
100 points each
Names 2 Physical and 2 Chemical changes
?
Allie is creating a model to show atoms of solid, liquid, and gas bromine. How would the three models differ?
a- size of atom
b- mass of atom
c- motion of atom
c
Iron nail properties P or C?
a - nail can rust
b - nail is denser than water
c - nail can be bent
a - chemical
b - physical
c - physical
Describe how to change liquid particles to solid.
Decrease thermal energy
Define Density
Anything that describes - degree of consistency measured by the quantity of mass per unit volume.
If you add food coloring to hot water, cold water, or room temperature water, which would the coloring mix with fastest? Or would it be the same?
Hot water