Quiz Unit 9. One attempt only, use legal name, 45 min

Which Kelvin temperature is equal to 56^oC?

• -329 K

• -217 K

• 217 K

• 329 K

The temperature of a sample of matter is a measure of the

• average potential energy of the particles of the sample

• average kinetic energy of the particles of the sample

• total nuclear energy of the sample

• total thermal energy of the sample

Which sample of matter has the HIGHEST average kinetic energy?

• 10 mL of H₂O_(l) at 65^oC

• 60 mL of H₂O_(l) at 55^oC

• 750 mL of H₂O_(l) at 45^oC

• 100 mL of H₂O_(l) at 35^oC

Which form of energy is transferred when an ice cube at 0^oC is placed in a beaker of water at 50^oC?

• Chemical

• Electrical

• Nuclear

• Thermal

A cube of iron at 20^oC is placed in contact with a cube of copper at 60^oC. Which statement describes the initial flow of heat between the cubes?

• Heat flows from the copper cube to the iron cube

• Heat flows from the iron cube to the copper cube

• Heat flows in both directions between the cubes

• Heat does not flow between the cubes

What is the amount of heat, in joules, required to increase the temperature of a 49.5 gram sample of water from 22^oC to 66^oC?

• 2.2 x 10³ J

• 4.6 x 10³ J

• 9.1 x 10³ J

• 1.4 x 10⁴ J

Which numerical setup can be used to calculate the heat enery required to completely melt 100 grams of H₂O_(s) at 0^oC?

• (100 g) (334 J/g)

• (100 g) (2260 J/g)

• (100 g) (4.18 J/gŸK) (0^oC)

• (100 g) (4.18 J/gŸK) (273K)

Which physical change is exothermic?

• CO_2(g) → CO_2(s)

• CO_2(s) → CO_2(l)

• CO_2(l) → CO_2(g)

• CO_2(s) → CO_2(g)

Which line that shows an exothermic in phase change process?

• C --> D

• D --> C

• D --> E

• E --> D

The graph below represents the uniform heating of substances from the solid to the gas phase.

Which line segment of the graph represents vaporization?

• AB

• BC

• CD

• DE