2024 2nd semester 3//3

Freezing point of water 0 degrees Celcius

Boiling point of water 100 degrees Celcius

What will happen to the hydrogen bonds when water at 30 degrees Celcius is warmed to 130 degrees Celcius the bonds will go from being temporary hydrogen bonds to 

• Permanent hydrogen bonds  at that temperature

• Temporary hydrogen bonds at that temperature

• Negligible hydrogen bonds at that temperature

Tags

NGSS.MS-PS1-4

The steam above boiling water is collected on a watch glass and is tested with a Blue Cobalt chloride strip what happens ?

• Nothing

• Turns purple

• Turns yellow

• Turns pink

Tags

NGSS.MS-PS1-2

Why does the steam filled balloon pop when heat is applied and the Hydrogen and Oxygen balloon when heat is applied explode?

• Steam filled balloon is not going through a chemical reaction but the Hydrogen and Oxygen filled balloon is 

• Hydrogen and Oxygen filled balloon is not going through a chemical reaction but the steam filled balloon is 

Tags

NGSS.MS-PS1-4

NGSS.MS-PS1-2

NGSS.MS-PS1-5

If water went from 20 degrees Celcius to 110 degrees Celcius Leg D would be 

• Heat of Condensation  (The amount of energy the molecules need to give the surroundings to change state)  

• Heat of Vaporization (The amount of energy needed to be added to the molecules from the surroundings to change state)

• Heat of melting (The amount of energy needed to be added to the molecules from the surroundings to change state)

• Heat of freezing (The amount of energy the molecules need to give the surroundings to change state)  

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Water changing from a liquid to a gas is ?

• Endothermic Physical Change in state of water

• Exothermic Physical Change in the state of water

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Water changing from a gas to a liquid is ?

• Endothermic Physical Change in state of water

• Exothermic Physical Change in the state of water

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Where does the power of a Hurricane come from ?

• The splitting of the interatomic bonds in a water molecule to form Hydrogen and Oxygen ?

• The condensation of water. The water molecules have to slow down going from water's gas state with negligible hydrogen bonds to water's liquid state with temporary hydrogen bonds. To form the intermolecular bonds of the liquid water the water molecules have to decrease their kinetic energy by giving the excess kinetic energy through collisions to the air which is sped up causing the air to warm up.

Tags

NGSS.MS-PS3-5

Since the change in energy when water molecules interact is smaller than the change in
energy associated with forming bonds, why is so much energy released and transferred into the
surroundings during a hurricane?

• There are a lot of water molecules all condensing into water drops during a hurricane,
  so even though one water molecule interacting with another does not add much
  energy, all of the interacting molecules add up to a lot of energy.

• The formation of energy pockets in the atmosphere creates an unpredictable amount of energy. 

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

What happens to the surroundings (the air around the water molecules and the energy of the
molecules in the surroundings) when the water molecules condense to form a liquid?

• The surroundings gain energy from the condensing water. The air molecules are
  moving faster, and the air warms up.

• The surroundings decreases energy from the condensing water. The air molecules are
  moving slow, and the air cools down.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Interatomic bonds have 131,738 Joules. Intermolecular bonds have 25,000 Joules. What if interatomic bonds powered a hurricane. Would the hurricane be stronger or weaker. 

• Stronger

• Weaker

Tags

NGSS.MS-PS3-5

NGSS.MS-ESS2-5