Phase Change and Heating Curves Re-Take

What change occurs from C to D?

• condensation
• vaporization
• melting
• sublimation

What line segment represents only the solid state?

• A-B
• B-C
• C-D
• D-E

Which letter indicates where water is in both the solid and liquid phase at the same time?

• A

• B

• C

• D

• E

The heating curve and specific heats and delta H of fusion and vaporization are given in the picture.

Calculate the amount of heat (in joules) released when 10.000 g of water is cooled from 80.00C to -10.00C

• 6893 J

• • -6893 J

• 2926 J

• -2926 J

The melting point of the sample is

• -60 ºC

• 20 ºC

• 60 ºC

• 100 ºC

What is the boiling point for this substance?

• 60 °C
• 40 °C
• 120 °C
• 100 °C

In which region(s) of the heating curve would water be a liquid and a gas at the same time?

• A

• B

• C

• D

• E

Between which two points is Heat of Fusion?

• A <----> B

• B <----> C

• C <----> D

• D <----> E

• E <----> F

Tags

DOK 3

analyzing a heating curve

Water exists as a _____________ at 3 mmHg and 50 °C.

• solid
• liquid
• gas
• supercritical fluid

The pressure is decreased on a sample of water at 0 °C from 800 mmHg to 0 mmHg.  In order, what changes occur?

• deposition, condensation

• sublimation, melting

• freezing, sublimation

• deposition, freezing