ChemCom Intro to Heat/Temp

Which of these conditions is always true for an exothermic process?

• They leave the surroundings feeling cold
• They release energy into the surroundings.
• They absorb energy from the surroundings
• The reactants gain energy as they form the products

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

When the temperature of matter increases the particles...

• speed up and move closer
• speed up and move farther apart
• slow down and move closer together
• slow down and move farther apart

Tags

NGSS.MS-PS1-4

No definite shape, but has a definite volume

• Gas
• Liquid
• Solid

Tags

NGSS.MS-PS1-4

Definite shape and a definite volume.

• Gas
• Liquid
• Solid

No Definite Shape and No Definite Volume

• Gas
• Liquid
• Solid

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Phase change from a solid to a liquid.

• sublimation

• melting

• condensation

• evaporation

Tags

NGSS.MS-PS1-4

Phase change from a gas to a liquid.

• condensation
• evaporation
• melting
• deposition

Tags

NGSS.MS-PS1-4

If a substance melts at 200 degrees and boils at 300 degrees, what state is it in at 150 degrees?

• solid

• liquid

• gas

During the process of melting and boiling, a substance's temperature

• increases.

• decreases.

• remains the same.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

If you have a sample of H2O that is 144 degrees Celsius, what state is it in?

• solid

• liquid

• gas

Tags

NGSS.MS-PS1-4