Phase Change Intro

When water is heated from 10°C to 15°C What is the change in temperature?

• 10 °C
• 5 °C
• 15 °C
• 25 °C

When a baked potato at 10 °C is heated to 180 °C in the oven its temperature change is

• 170 °C
• 10 °C
• 180 °C
• 190 °C

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

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

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

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

• heat of fusion

• heat of solid

• heat of liquid

• heat of 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