chANGES OF stAte

Sublimation occurs when a(n)
________
changes directly to a gas.

solid

How much heat is released when 25.0 grams of liquid copper at its freezing point of 1,085�C changes to solid? The latent heat of fusion of copper is 205.0 J/g.

-5,130 J

The latent heat of fusion of mercury is 11.8 J/g. The amount of energy, rounded to the nearest tenth, needed to change 8.00 grams of mercury to a liquid is
J.

94.4

Latent heat of vaporization refers to which changes of state?

liquid to gas or gas to liquid

Which changes of state occur between solids and gases? Check all that apply.

deposition
sublimation

Heating curves show changes in .

temp and heat

Which best compares freezing and condensation?

Which best compares freezing and condensation?

How much heat is released when 12.0 grams of helium gas condense at 2.17 K? The latent heat of vaporization of helium is 21 J/g.

-250 J

Sara places a cold bottle of water in the sun. After several minutes, she notices that water droplets are collecting on the outside of the bottle.
Which change of state does this illustrate?

condensation

The diagram shows a heating curve for a substance that begins as a solid.
https://media.education2020.com/evresources/8301/8301-06/8301-06-05/8301-06-05-assessment/8301-06-05-13.PNG

2

What change of state occurs during vaporization?

liquid to gas

Which headings best complete the chart?

X: Heat Is Absorbed
Y: Heat Is Released

Latent heat of fusion refers to which changes of state?

solid to liquid or liquid to solid