Last week Chem Review

The specific heat(c) of copper is 0.39 J/g °C. The 20 g chunk of copper is heated from 30˚C to 98˚C. It absorbed 100 Joules.

Which is the change in ∆T?

• 30˚C

• 98˚C

• 68˚C

• 100 J

Tags

CCSS.8.EE.C.7B

The temperature of an unknown piece of metal with a mass of 30.00 g changes from 25.0 °C to 35.0 °C when the metal absorbs 350.0 J of energy. What is the specific heat of the metal?

• 1.17 J/g°C
• -1.17 J/g°C
• 0.857 J/g°C
• -0.857 J/g°C

Tags

NGSS.HS-PS3-1

The specific heat(c) of copper is 0.39 J/g °C. What is the temperature change(∆t) when 100 Joules of heat(Q) is added to 20 grams?

• 12.82 °C
• 24.12°C
• 351 °C

Tags

CCSS.8.EE.C.7B

The specific heat of aluminum is 0.9025 J/g°C. How much heat(Q) is released when a 10.0 g piece of aluminum foil is taken out of the oven and cools from 100.0° to 50.0°?

• 451 J

• 45.1 J

• 400 J

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

How many joules of heat are needed to raise the temperature of 10.0 g of aluminum from 22.0°C to 55.0°C, if the specific heat of aluminum is 0.903 J/g°C?

• 298 Joules

• 0.003 Joules

• 297 J/g°C

• 0.003 J/g°C

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4

A 300.0 g piece of copper is heated and fashioned into a bracelet. The amount of energy transferred by heat to the copper is 66,300 J. If the specific heat of copper is 0.3845 J/g ⁰C, what is the change of the copper's temperature?

• 575°C

• 756 °C

• 756 J

• 641 J

Tags

NGSS.HS-PS3-4

When the temperature of matter increases the particles...

• speed up and move closer
• speed up and move farther apart
• slow down and move closer together
• slow down and move farther apart

Tags

NGSS.MS-PS1-4

Which container will have a lower pressure?

• left
• right
• they both have the same pressure
• I don't know

When the temperature of matter increases the particles...

• speed up and move closer
• speed up and move farther apart
• slow down and move closer together
• slow down and move farther apart

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which of the following would increase the (gas) pressure of a system?

• Increase the Temperature
• Pump in more gas
• Decrease the volume
• All of these