Calculating Heat of Fusion and Heat of Vaporization

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

NGSS.MS-PS3-4

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

• 32732J

• 146.3J

• 11690J

• 39939.9J

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

How many joules are required to boil 75 grams of water?

• 25050J

• 169500J

• 31350J

• 10000J

Heat of vaporization is for which phase changes? You may select more than one answer.

• condensation

• melting

• freezing

• evaporation

Heat of fusion is for which phase changes? You may select more than one answer.

• condensation

• melting

• freezing

• evaporation

Tags

NGSS.MS-PS1-4

Calculate the amount of energy required to melt 35.0 grams of ice.

• 79100J

• 146.3J

• 11690J

• 39939.9J

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4

When do you use 334 J/g? You may select more than one answer.

• if a substance is condensing

• if a substance is freezing

• if a substance is evaporating

• if a substance is melting