Specific Latent Heat

How much energy is required to change 5 kg of ice at 0  $\degree$ C into water at the same temperature? (latent heat of fusion is 3.36 X $10^6$ J/kg )

• 16.1 X $10^6$ J

• 16.8 X $10^6$ J

• 15.1 X $10^6$ cal

• 16.8 X $10^6$ cal

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

How much energy is required to melt down a 2000 g of mercury?(latent heat of fusion is 1.14 x  $10^4$ J/kg)

• 2.55  x  $10^4$ J

• 2.28 x  $10^4$ J

• 2,280 x  $10^4$ J

• 3.28  x  $10^4$ J

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

6.78 x 10⁶ J of heat is removed from a mass of steam to produce water. What is the mass of water produced?

• 3 g

• 9.8 kg

• 12 g

• 3 kg

Calculate the amount of heat added to 15 kg gold to change phase from solid to liquid. (The heat of fusion for gold is 64500 J/kg)

• 967,500 calories

• 976, 500 Joules

• 967,500 Joules

• 976, 500 calories

How much energy is required to change 2600 g of water at 100 $\degree$ C into steam temperature? (latent heat of vaporization is 2.26 x $10^6$ ) 

• Q = 5.9 X $10^6$  J

• M = 5.9 X $10^6$  J

• C = 5.9 X $10^6$  J

•  $\Delta$ T = 5.9 X $10^6$  J