Phase Changes Dewett

It's the amount of heat required to change the state (gas,liquid, solid) of a unit of material

• Latent Heat

• Specific Heat

• Temperature

• Q

Tags

NGSS.HS-PS3-4

Latent heat is

• the heat absorbed or released at a boiling process during a change of phase

• the heat absorbed or released at a constant temperature during a change of phase

• the heat absorbed or released at a constant temperature during a change of phase of 1 kg object

• the heat absorbed or released by an object to increase or decrease its temperature by 1 degree Celcius

The heat absorbed by melting a solid is known as

• latent heat of fusion

• latent heat of solid

• latent heat of liquid

• latent heat of vaporisation

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

specific latent heat of vaporisation is

• the amount of heat required to change 1 kg of the substance from the solid to liquid phase without change in temperature

• the amount of heat required to change 1 kg of the substance from the liquid to gaseous phase without change in temperature

• the amount of heat required to change the temperature 1 kg of the substance by 1 degree Celcius

Water molecules have the greatest kinetic energy in

• Ice at 0 ⁰C

• Water at 90 ⁰C

• Water at 373 K

• Steam at 150 ⁰C

Tags

NGSS.HS-PS3-2

The graph shows the cooling curve of a substance. At which stages the specific latent heat released?

• AB and CD

• BC and DE

• AB and EF

• BC and CD

Tags

NGSS.MS-PS1-4

Calculate the energy absorbed by 30 g of 100 ⁰C water that is turned into 100 ⁰C.

• 67 800 J

• 6 7800 J

• 678 J

• 67.8 J

Tags

NGSS.HS-PS3-4

• 16.1 XundefinedJ

• 16.8 XundefinedJ

• 15.1 Xundefinedcal

• 16.8 Xundefinedcal

Tags

NGSS.HS-PS3-1

The graph shows the cooling curve of a substance.
The specific latent heat released at stages?

• CD and FG
• DE and EF
• EF and FG
• DE and FG

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

How many Joules of energy are required to make 100 grams of ice at 0 ^οC completely melt? The specific latent heat of fusion of ice is 334000 J/kg

• 200 J
• 400 J
• 33,400 J
• 2,000,000 J

Tags

NGSS.HS-PS3-4