Heat of Fusion & Vaporization

The amount of heat needed to change 1 gram of a substance from the liquid phase to the gas phase is ___

• Heat of Vaporization

• Boiling point

• Heat Energy

• Phase change

Calculate the energy needed to completely boil away 30 g of water at 100 ⁰C .

• 67,800 J

• 2260 J

• 226,000 J

• 100 J

Tags

NGSS.HS-PS3-1

How many Joules of energy are required to make 50.0 grams of ice at 0 ^οC completely melt?

• 334 J

• 0 J

• 33,400 J

• 16,700 J

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

A certain amount of liquid water required 17000 J of heat energy to completely vaporize it into a gas. What is the mass of this liquid?

• 7.52J

• 7.52g

• 38420000 g

Tags

NGSS.HS-PS3-1

How many Joules of energy are required to make 100 grams of ice at 0 ^οC completely melt?

• 200 J

• 400 J

• 33,400 J

• 2,000,000 J

Tags

NGSS.HS-PS3-1

Calculate the amount of energy required to freeze 98.0 grams of water?

• 32732J

• 146.3J

• 11690J

• 39939.9J

Tags

NGSS.HS-PS3-1

When 20 g of a substance are completely melted at its melting point, 3444 J are absorbed. What is the heat of fusion of this substance?

• 68880 J/g

• 172.2 J/g

• 0.0058 J/g

Tags

NGSS.HS-PS3-2

How many grams of water will completely melt by adding 17034 J of heat?

• 123456 J

• 5689356 g

• 51 g

Tags

NGSS.HS-PS3-4

If I heat up 2 pans of water one has 100 mL in it and one has 1000mL. Which one heats up the fastest?

• 100 mL
• 1000 mL
• They both heat up at the same speed
• They cool down.

Tags

NGSS.HS-PS3-4

The heat absorbed while a solid is melting is known as....

• heat of fusion

• heat of solid

• heat of liquid

• heat of vaporization