Specific Latent heat

Specific latent heat is the energy needed to change the state of ___________ of material

• 1g

• 100g

• 1kg

• 100kg

When a solid melts the particles

• get closer together

• separate completely

• evaporate

• vibrate faster

In the equation E =mL the E stands for

• Entrance

• Energy

• End

• Elastic

In the equation E =mL the m stands for

• mass

• movement

• motion

• motor

In the equation Energy = mass x specific latent heat the unit of energy is

• Degrees (^oC)

• Kilograms (kg)

• Seconds (s)

• Joules (J)

In the equation Energy = mass x specific latent heat the unit of mass is

• Degrees (^oC)

• Kilograms (kg)

• Seconds (s)

• Joules (J)

Specific latent heat of FUSION is the change from

• solid to liquid

• Liquid to solid

• Liquid to gas

• Gas to liquid

Specific latent heat of Vaporisation is the change from

• solid to liquid

• Liquid to solid

• Liquid to gas

• Gas to liquid

E = mL

How much energy does it take to evaporate 2 kg of water?

The latent heat of vaporisation of water is 250,000J/kg

• 250,000 J

• 125,000 J

• 500,000 J

• 0.000008 J

E = mL

How much energy does it take to melt 4 kg of Lead?

The latent heat of fusion of Lead is 22,000J/kg

• 5,500 J

• 11,000 J

• 22,000 J

• 88,000 J