Enthalpy and Changes of State

The heat absorbed by one mole of a solid substance as it melts to a liquid at a constant temperature.

• Molar heat of fusion.

• Molar heat of solidification.

• Molar heat of vaporization.

· The heat lost when one mole of a liquid substance solidifies at a constant temperature.

• Molar heat of solidification.

• Molar heat of vaporization.

• Molar heat of fusion.

Tags

NGSS.HS-PS3-4

The quantity of heat absorbed by a melting solid is different from the quantity of heat released when the liquid solidifies .

• True

• False

Tags

NGSS.HS-PS3-4

• 16.7 kJ

• 2.16 kJ

• 150 kJ

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

A liquid that absorbs heat at its boiling point becomes…………….

• a vapor

• a liquid

• a solid

The amount of heat required to vaporize one mole of a given liquid at a constant temperature is called its ..........................

• molar heat of vaporization.

• molar heat of fusion.

• molar heat of solidification.

Tags

NGSS.HS-PS3-4

Condensation is the exact opposite of vaporization.

• True

• False

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

When a vapor condenses, heat is absorbed.

• True

• False

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

The …………………………... is the amount of heat released when one mole of a vapor condenses at its normal boiling point.

• molar heat of condensation

• molar heat of fusion.

• molar heat of solidification.

The quantity of heat absorbed by a vaporizing liquid is exactly the same as the quantity of heat released when the vapor condenses.

• True

• False